$40 + $20 is my willing-to-bite price for Rock Band 3, and I've missed it a handful of times now. Only problem for me is I don't have nearly as much money as I'd like and would rather hang onto my money for Black Friday super-deals... though I have a feeling very little of anything will appeal to me this year. When Babysitting Mama for $5 is the most appealing thing I've seen so far, I know my hopes are probably not going to be met. So, maybe I'll bully myself into buying RB3 within a week. Who knows.
Mad Catz is apparently republishing Rock Band 3 in the near future, for what it's worth. I'm not going to speculate what impact that will have on the price of currently available RB3 goods.