We have mentioned the soundtrack for TRON:LEGACY by Daft Punk a couple of times in the past and a few days ago six tracks have surfaced online.  Previously a bunch of fake tracks appeared online, this seems like the "real thing".  This is obviously a highly anticipated release (the score AND the movie) so I imagine that this was more of a "controlled" leak vs. someone stealing the songs.  Also since they are appearing on a site for a Seattle based radio station.

UPDATE:  There are reports that some of the recent leaks are fake.  The ones that were linked here were in fact real as Disney asked them to take it down.  You can still hear a taste of the new Tron soundtrack over at their official site.