Personally I love this look! We are doing a mostly white kitchen with some grey. We couldn't get the gold within our budget but we are mixing metals. We are using bronze on all the bottom cabinets and a pewter on top. Our appliances will be stainless and we have a stainless farmhouse sink.
I've only seen an aged gold faucet online, and again while I love it, it's beyond our budget.

You are talking about the very significant "warming trend" in metal finishes and an equally strong trend to a mix in metals. This abounds in living spaces far outside of kitchens as well! I am in the finishing of just such a kitchen at this very moment. My client is thrilled, as am I. The "gold" look you refer to is often soft brass, or it's gilded iron.... it isn't grannies greenish brass of the early eighties in any way shape or form!

As to the faucet, the soft brass tends to be still a bit restricted to the most traditional styling, far less available in a more transitional vein - they are always last to catch up!!! Not saying it isn't out there at all, but can be difficult to see in person at your local plumbing supply, is far less represented; making the selection via computer or small sample chip scarier. In my clients case, we limited the soft brass accents to lighting, and gorgeous pulls for the cabinetry.. The "mix' comes through beautifully, and my client stayed nicely in her comfort zone as well. We can't wait for the final finish.: )