How you do the bottle caps:
Arrange them in a frame, pour in acrylic, let dry, enjoy. You can even tint it and shoot light through it if you wish.
Call these people:
http://www.hastingsplastics.com/ I personally like cultured marble, but my buddy and I used Pergo flooring when we built his and it looks like an oak bar and it's virtually indestructible.
Go ahead and put in a kegerator and a wine chiller (both cheap at home depot) and put in a small hand sink if you're serious. I also would get a small ice maker in there somehow. We installed a soda gun in his bar too, 20# co2 tank and 4 syrups plus water. The back bar was made with a piece of mirrored plexiglass with some wood trim and a mantel we found at a yard sale. Looks really nice, next time I am over I'll take some photos.
http://www.sodabarsystem.com/index_Soda_Dispenser_IC.htm That's his Soda Gun, he bought it used at a restaurant supply house for $800, so check those places out before you buy new.