There's a fair amount of hype surrounding Blizzard's integration of Brood War music into Starcraft 2, but today, OverClocked Remix, the premier community organization for video game music arrangements, released their first remix from either game, a chill, ambient rendition of the Wings of Liberty main theme.
Post link: http://ocremix.org/remix/OCR02800/
Free download: http://ocrmirror.org/files/music/remixes/StarCraft_2_Broken_Wings_OC_ReMix.mp3