CoverSutra available here
http://www.coversutra.com/
i have it, and it is actually the best one out there.
I agree completely
I got CoverSutra with MacHeist bundle too. I thought I'd never even use it and laughed it off as a cheap throw-in to the bundle. But now I really like it!
--Chris
Haha exactly the same here. In fact, it's one of my favorite and most used apps from the Macheist bundle.
I love everything about it.
I got CoverSutra as part of the MH bundle too but never installed it. What's so good about it?
Well, it shows your Album Art work on your desktop in every space (the app, spaces) when you open up iTunes (If you open Coversutra, too). It's very configurable so that you can show a Vinyl record, older style CD case or modern CD case with your artwork in. It also allows you to press hotkeys to rate your music - which is very useful and nice

And I think it has a search too... and more!
It's all-in-all a very nice app. Probably more recommended to those who have bigger displays (Mine is no problem on my 20" but I doubt someone with a 13" has the space for it).
I think it only costs about $15 too but really, it's a bargain for such nice software.
If you're a Spaces user and you keep iTunes open in another space, this is just the best thing to use when you want to check up what song is playing or give the song a different rating whilst you do something productive. It mixes work with fun in a non-disruptive way. Heck, Tiger users will still benefit because you can close the iTunes window yet still have full control over it without your music getting in the way.
I honestly recommend this to anyone who listens to music while they do computer-orientated work
