For the past few years, I’ve been posting links to music samplers associated with the extravaganza that is the SXSW Music festival, here in Austin. These samplers come from record companies plugging their showcasing bands, NPR stations, and most awesomely, from the nice folks at The (Unofficial) SXSW Torrents site, who scoop up the tracks made available by SXSW itself, and package them in several juicy torrent files. In fact, downloading these torrents has been…