OT - Music to listen to when working?

[Easy Mac]

So whats some good music to listen to while working, or schooling or whatever. Writing a paper now, and its pretty much whatever comes on my out of 1200 or so songs.
Coldplay just came on, right after Juvenile... these things need to get some better logic working, or I need smaller playlists.

So far I've found Sparta really helps me focus... how about yourself?

And how about that hack or whatever, where it shows whats now playing in your sig. Or that an html thing?