I second the motion to have more Garbage. And Crash Test Dummies.

I miss the Go-Gos. I always think, "What if ..." as far as their career. They had such a good sound, and then they fell apart.

Other bands that sadly quit for various reasons, with lots of miles still left in the tank:

Blondie - Chris Stein's lupus, right? I know that they did "No Exit" a few years ago.
The Cars - I hear they are working on a new album
The Police - we did get a few good Sting albums out of that, at least, but I heard the recent reunion tour was boring

Bears, beets, Battlestar Galactica.