[quote name='mietha']I have no idea why you people think they will update. Harmoix claimed at the beginning that the list would not be added to (a lie, I know, but still). They added the Green Day songs so they could be part of the video contest. The others: eh, I don't know. They, however, have not done an update (to my knowledge, at least) since the video contest ended, which I believe was July 31st, nor do I expect them too. They should, however, add more Wii points, being as that is a legitimate win. The contest is in the wind-down phase. I seriously doubt they would bother adding any at this point.[/QUOTE]
I don't think they added Green Day just for the video contest; the other updates they've had to the track list added recently released songs too. Between the Twitter and the Rock Band forums, it sounds like there's been a lack of communication between Pepsi and Harmonix. Whether or not that translates to more songs is anyone's guess.
As for Wii points...given that there's a month left there will probably be more added, but I don't think they'll make it to the end of the promotion.