Looks like a bug has been discovered in Rock Band 2 that can randomly reset your band’s progress under a certain set of curcumstances. So far it appears that it only happens if you play the career mode with a certain combination of accounts - notably a player with a Live-enabled account, and a player with a non-Live-enabled account.
Here’s hoping they fix it before the UK release, although I actually don’t think I’d suffer from it anyway, since Marie & I both have Live accounts, and when other people play they don’t use their own accounts, they just jump in as ‘Player 3’ or whatever; so far those combinations sound like they’re immune to this bug.
The moral of the story would seem to be not to use non-Live accounts with Rock Band 2. I’m not sure why you would anyway, if your machine is connected to the internet, since a ‘silver’ Live account is free anyway (and it’s still a ‘Live-enabled account’ - you get leaderboards & gamerscore tracking but not multiplayer). Still, a nasty bug if you happened to get caught by it.
Looks like the new Rock Band site is going live as we speak, they have a placeholder page up right now. The new site will allegedly let you take photos of your band to share online, get (real) T-shirts branded with your bands logo and other fun (yet entirely pointless) things. Obviously I’m looking forward to seeing that.