As many other users I was everything but pleased when Apple replaced the nice Aqua skin in iTunes 10 with an essentially black-and-white “graphite” skin.
With the modified skins published at http://macthemes.net/forum/viewtopic.php?id=16805800 I was able to breath new life i.e. color into iTunes 10. I’m using the “Aqua, colored sidebar & v10 standard caption buttons” skin which makes iTunes 10 look more or less like it used to be.
Those who would want to fiddle around themselves could use ThemePark to edit iTunes.rsrc.
Looking for a more stylish iTunes icon I came across http://www.toffeenutdesign.com/goodies#itunesten which I really like.