This sink will be a bit different from one that I have done in the past because the faucet and handle are coming directly from the wall (into a basin). For example - http://www.stoneforest.com/frameset/4main.html . I know how to do it if all the plumbing is under the sink, but what are the "gotchas" and other things when the plumbing and everything is in the wall? When you have the plumbing under the sink, you can have a valve that you can turn off the water if you want to replace some fixture etc ... where would you put that valve? In the wall with a cover to open up to reach that valve? Also, I can't imagine you would just put the faucet \ handles right up to the dry wall. Other than a back splash, what else would you do there ... maybe you do just put the faucet \ handles right up to the dry wall with a decorative cover.
Another issue - we were thinking of putting just a straight pipe from the wall ... a real rustic looking pipe. Not an actual faucet or a bent pipe but an simple brass \ copper \ bronze staright pipe coming from the wall. Someone was telling me that "code" does not allow a straight pipe and that you need a "difuser" or something like that (maybe I misheard or don't remember the right term). A faucet is basically just a pipe anyways, but they say it keeps the water flow reduced or something. I haven't heard that before, but then again, when I put in a sink before it was all just standard stuff.