They have a link set up for folks to request songs they would like to possibly see on the next release!
Based on personal opinion judging play-ability and songs that more "gamers" can attach to; I've been requesting the following tracks daily while at work:
(By no means should you follow my lead. Request what you want.)
Innocent
Somewhere Out There
Not Enough
Superman's Dead
Clumsy
The link is http://www.harmonixmusic.com/games/rock-band/request/
I'm still coping with the fact that Harmonix never added any NSYNC to Dance Central.
