If you feel like buying some music online, here are two great sites. Both sell their music without any DRM (Digital Rights Management) that restricts what you can do with the digital files. This way you can support artists you like without having to submit to some overbearing corporate profit center.

track it down - the complete source for electronic/dance music. Singles, remixes, All the latest the things you would find on vinyl. And you can get very high quality/high bit rate encodings.

amie street - independent music, songs start out all priced at the same rate (very low, around $.10 or so), and become more expensive as they get more popular. You can earn credits for referring people.