I have to admit, I thought Guitar Hero was more or less dead. But being able to use Rock Band instruments, there's no reason not to buy this game. I'm not enough of a musician to really enjoy the creation tools, but I'll definitely enjoy messing around with them, and I'm betting the community will wind up recording not only original stuff but versions of favorite, more obscure band songs for download too. This looks pretty damn cool.
I'd embed the video, but the embedding code is giving Blogger fits. So instead, a link to 1Up.com's 9-minute video of a music creation demo for Guitar Hero. It's pretty cool that you can do drum loops, keyboards and just a ton of variety.