I'm going to guess either an experimental run in double bass or an increase in weekly songs.
Some of us on the PS3 may remember this old gem:
From:The PS3 may see a more robust RBN coming out with inclusion in Rock Band 3, however (more on that later).
It's not a direct quote, but it seems to be a paraphrasing or summary from Rockbandaide's interview with John Drake. I'm hoping whatever it is, it has something to do with the more robust RBN for PS3.
"You are cool, bigmf." - TheStuddz