So yeah from tomorrow (the 16th to the 18th of feb) there will be a free track available to download from the marketplace, the track is Dream On by Aerosmith. Remember its only available for a couple of days, so dont forget!
Dream On: http://www.youtube.com/watch?v=sNzEQ8hG1zA
"To celebrate this historic, ground-breaking collaboration, Guitar Hero® III: Legends of Rock fans will have the opportunity to download and jam to Aerosmith??eam On.?he song will be available for free from February 16-18 on Xbox LIVE® Marketplace for Xbox 360® video game and entertainment system from Microsoft and PLAYSTATION®Store for the PLAYSTATION®3 computer entertainment system. For more information, please visit http://www.guitarhero.com."
And yeah theyve kind of also confirmed Guitar Hero: Aerosmith for release in June, make of that what you will :S