[UPDATE] Rock Band 2 allows free access to Rock Band tracks
According to a transcript from the Insider program at IGN, Rock Band 2 will be capable of downloading the set list from the original title free of charge. This is on top of having the ability to redownload all of the content you've previously paid for from the previous installment. For those of you wondering what the set list for Rock Band 2 will bring, you'll have to continue to wait as only rumors have been circulating the title thus far.
As for the release date? That's still unknown as the PlayStation 3 format has still yet to receive anything concrete. Hopefully Harmonix will be willing to let us in on that come E3.
IGN has since issued the following statement: "Nate (the originator of the above quote) goofed in writing that. He hopes that is allowed. Nothing about this has been announced and Nate's never even seen RB2. Sorry, guys."