1)Cypress is beautiful. Almost flawless in appearance if you get good stuff
2) Older growth cypress (as far as I understand) is still available
3) It accepts sealer much more evenly and deeply and does not need nearly the constant attention ipe needs (unless you layer on TWP like John suggests and swears by)
4) is cheaper, easier to work with and can last 35+ years with proper care.

Negative.. will not last unltimately long as ipe, but I am not interested in a 100 year deck. These are only my opinions and I am open to flames.

CM2, none that I know of. I would think that would be a pretty rare find in my market.

Presure Pros and anyone else: I live here in Southern Delaware. Any idea where a good source for cypress decking is? Also, What fasteners do you recommend for 5/4 and 2x cypress?

Its a market thing Crabperson,cypress old growth might be found some place hard to say, there might be some old pond soakers down in the river, if so they will be as good as the day they went down, there might be a lumber yard that has decking just waiting for you to buy, and you might save a few bucks.

Buttttttt,its not near as easy as a phone call to East Teak and a three day wait.With high $ material like ipe or cypress I use nothing but stainless steel fasteners. J

Will the trimhead hold on the softer cypress or go w/ the #10? I won't be plugging.

Like Cedar you probley wont have to pre drill with cypress,the trim heads work fine for me. J