MS released some new themes for XP that look kinda cool. Until Vista comes out, I will be using the above pictured Zune theme. The artist who knows about it (who uses a MacBook) was using an internal incarnation of it at Microsoft for a year. They decided to touch it up and release it as a Zune theme. Nice.
(Note: apologies for the color glitches in the JPG above. MS Paint decided to add that when saving)