Here is the torrent containing all the MP3 files publicly available from bands that will be showcasing at this years South By Southwest Music & Media Conference. This torrent currently contains 646 songs at 3.35GB (but might be updated).
Links to torrents for previous years can be found on The (Unofficial) Home of SXSW Torrents website.
If you’re not interested in downloading/seeding but still want to listen to the music try this streaming SXSW 2010 Music Player