I prefer wall mounted faucets. I like the way they look and it's easier to clean the back of the sink without the deck mounted faucet there.
As far as cons go, the only thing I've come up with is the resulting wall damage if and when you have to investigate a leak.

It is funny how people seem a bit more nervous about wall mounts in the kitchen when just about all tub/shower faucets are wall mounted . . .

One of the biggest draw backs to wall mounts is that it is difficult to install things like shutoff valves at the faucet.

I love the look of a wall mount kitchen faucet but I could not get DH to agree- and he is my plumber.

"outside wall in New England"

Goodness, water lines in an outside wall are banned in Baltimore because of freeze/thaw - I can't imagine they aren't banned there.

Most kitchens in most homes have the kitchen sink plumbing coming out of the exterior wall underneath a window. If the pipes havent frozen yet, then they won't freeze if you install a wall mount faucet.

I think people stopped using them because a lot of vendors didnt make a huge selection of them, especially in more modern/contemporary styles.

Insulate the wall and go for it!

Thanks for the feedback, everyone. Good point about the tub/shower faucets. And true, my sink plumbing was already on this wall and hasn't frozen. But it's coming up from the floor and not along the wall. Maybe those few inches make a difference? We're gutting the walls so can insulate the wazoo out of it, but our winters can be very cold.

Bmorepanic, in Baltimore, you can't have a wall-mount under a window? But you could have a deck-mount? Maybe there's code issues I need to consider.

Johnliu, what wall-mounts are you considering? Have you found one with a spray (or does that not matter for you)? Or are you doing some amazing commercial pre-rinse setup?

We just bought an awesome wall-mounted faucet but it's pretty unique so may not be for everyone. It has a sprayer, which I really, really wanted, but the matching hose rests on TOP of the gooseneck (the gooseneck is like an open channel). You don't notice this unless you're looking...it's a wierd one but I like weird. ;) Very high quality too. Here's a pic of it resting on my underlayment (countertop not in yet) and prior to being installed (see bottom link)...

Oh and here's the link to their website:
http://www.jaclo.com/products/detail?pid=796&cid=123

Here is a link that might be useful: The wall faucet resting on the counter...

I have a wall mount in my bathroom and love it. I'm doing another wall mount in the one of the bathrooms in the home we're remodeling now. They do have single lever wall mount faucets. THey tend to be somewhat contemporary.

Also, it is hard to find a wall-mount faucet with a sprayer, though there are a few, but the wall-mounts with sprayers tend to be $$$. If you have a large sink, you'll want a sprayer.

I love the look, and love getting the faucets off the counter so that it's easy to clean the counter. But I too would be concerned that if there were a problem, you'd have to open the wall to fix it. I'm not sure if Macybaby's comparison to bathroom wall faucets is a good one. A kitchen faucet is turned on and off constantly many times a day, and while it's on, the temperature and the water pressure are often fiddled with. But a bath/shower wall faucet is turned on to a cerain temperature the bather likes, left on while bathing for a certain amount of time, then turned off. The wear and tear just wouldn't be the same for both kinds of wall faucets.

There have been some posters on the Kitchens Forum who have bought the Chicago Faucets wall-mounted faucets. The company has been around forever, and their wall faucets haven't changed much in all the years. Their faucets last a lifetime, so you needn't worry about anything going wrong behind the wall. Just don't get one of the really tall wall-mounted Chicago Faucets faucets cause there could be splashing outside of the sink.

Here is a link that might be useful: Chicago Faucets

You know I am a fan of the wall mount! Had three in last kitchen and will have 4 in this kitchen.

Definitely make sure you get a faucet spout long enough for your comfort so you don't have to bend. I think a 10-11" reach is good. The faucets usually have escutcheons that make the faucet project out a bit more. Chicago Faucets do have jointed spouts that can be extended and seem very convenient. They are affordable, too.

The wall mounts are often very expensive. I always have used Kingston Brass and think the quality is very very good. No problems and you can call customer service and get information from them very easily!

I don't know if you are going with an RO filter, but I was sad to find out there are no RO wall mounted faucets. Well, not that I could find.

Again, bathtubs and pot fillers have wall plumbing. Not a big deal.

There are non-vintage styles out there:

http://www.faucet.com/decor/product.pl?mid=89189&fh=Vibrant%20Stainless&CID=gba_171726&CAWELAID=443455471

And there are single handle ones:

http://www.homeclick.com/web/catalog/product_detail.aspx?pid=360697&chnl=cse&ven=googlebase&cat=Kitchen%3AKitchen%20Faucets&brnd=Kohler&itm=360697K-6228-C12-CP%7CKohler%20K-6228-C12-CP%20Karbon%20Wall-Mount%20Kitchen%20Faucet%20Polished%20Chrome%20with%20Black%20Tube%20-%20K-6228-C12-CP&CAWELAID=514207325

I don;t know about the window sill issue, but the faucets project out a bit (usually) so I wouldn't think you would get sore knuckles.

So excited your remodel is under way!

The difference between wall mounted tub fillers and showers, etc. and wall mounted sink faucets is that most areas require a back access panel behind tub fillers/shower diverters. Servicing a connections of a wall mounted kitchen faucet is not as straightforward. I like wall mounted sink faucets a lot but its not quite the same species as tub fillers.

The house I grew up in has all the original bathroom fixtures/plumbing, all original kitchen/some original appliances etc. for 42 years, but Four kitchen faucets. Just something to think about.

Shelf-mount might be the answer to whether wall insulation will be sufficient, and whether one needs back access.

Shelf-mount is easy to install once you build a sturdy shelf.
Shelf-mount has a bigger advantage, because it puts the handle closer to the user.

The code police don't care about the window, we can't have any water line whatsoever in an exterior wall.

We have a lot of basements for the same reasons New England does - once you've dug down to the frost free point, you might as well keep going. So the kitchen and first floor bath lines come up through the floor and the second floor bath lines are in an interior wall.

Pickle, I plan something from Chicago Faucets, and I like the wristblade handles too. I have an old house so it fits.

Sounds like I need to check our code or call our plumbing inspector.

Theresse, that is one cool faucet! Sabjimata, the jointed Chicago is the one I wanted the most after tons of research. Love it!

Oops. I didn't mean the window had any bearing on code. Just the exterior wall. I was writing as I was thinking about our situation...unclear, bad writing.

I think we've replaced our kitchen faucets every 5-7 years due to failure of some sort. They haven't been the uber-nice ones, but neither were they junky. However, if the faucet fails, can't you just replace it without having to go into the tile/wall? No?

I'd never heard of a shelf-mount. I don't think that would work in our situation (with the existing window), but interesting option.

Bmorepanic: Hmmmm....I'm planning to have the plumbing for a future second floor bath addition roughed in atop the new addition to my kitchen. The plans call for water and waste lines in an exterior wall...and I'm in the city of Baltimore. Contractor hasn't mentioned a problem. Plumber hasn't mentioned a problem and permits have been pulled. Am I likely to get a shock when the inspector arrives?

Wall mounted faucets have pros and cons. With proper planning they both have there place. If a wall mounted faucet leaks ( it is difficult to service, and will cause damage if wall needs to open up ) plumbing on exterior walls is the other reason.... if insulation gets wet it reduces its effectiveness ( or it will loose its R- value ). If you are dealing with an interior wall ( hopefully backing onto closet, for service ) go for it.... deck mounted faucets are much easier for service as well as replacement.

Having two handles is an UPSIDE not a DOWNSIDE! those one handled faucets drive me nuts. You can never get the exact temperature you want -- it is often just either cold or hot. No warm.