Re: Wire Concealment
There are things like WireMold, which may be what Troy is talking about - although properly done the backing piece does get screwed to the wall proper.
There is also the theory of the woven plastic tube that you run everything through; some people like that.
Depending on your decor, you may also consider building a 3 or 4 sided wooden box that would "lean" against the wall, with everything inside it. Stained and polished, maybe even extending to "frame" the entire display...
Leo