Don't like the look of iTunes 10? Grey buttons bothering you? They bothered me too.
So I played with the iTunes.rsrc file and brought some of the colored icons from the old version back. It's quick and dirty, and there are definitely some icons that won't look right, but I'm not getting paid to do this! This file is for Mac only and hasn't really been tested, though I've heard that it works for most.
Unfortunately there was so much demand for this that I had to take it down, as bandwidth was getting expensive.