One thing you might also consider is downloading Microsoft's Zune software. You can buy their Zune Pass thing which gives you unlimited downloads for $15 a month. The only catch is that if you discontinue your subscription, the music you downloaded self-destructs. This is all well and legal...up until the point that you use another piece of software called TuneBite to strip the DRM from the files and they are yours forever (technically, it re-encodes them in a non-DRM format). This way you can pay for your cake and keep it forever in a cryogenic chamber too. I think I got that metaphor wrong. You pay a small amount of money, you break a teeny, tiny law, then you takes the music, Labowski. You get the point.
i know a guy who did this and got 16gigs of music for free... just sayin' it works.
eh, Whats wrong with Limewire?
it sucks.