Funked,
You do know that even azureus isn't anonymous, right? The bittorrent creator specifically kept it traceable, so all it takes is someone, either the govt or more likely an RIAA legal team, to use a special purpose bittorrent client to notice and subpoena your isp, and you're toast. Azureus just added an encryption feature, but don't for a minute believe that it anonymizes you, because you still had to contact a tracker from your ip address, and the tracker is plain-text html.
That's why I say *finger* to the RIAA, buy only music that I really want, refuse to buy anything from sony (once bitten...), and immediately strip the DRM off of any purchased music so I can use it however I choose.