d20 Modern
I picked up d20 Modern recently and I've been reading through it trying to learn the system. I had borrowed the book several months ago from a friend and spent a few days looking at it, so I had a pretty good idea of what I'm getting into. Once I feel comfortable with the system (and after I've subjected Ellen to a few sessions), I might try to run something with it.
I won't be abandoning my GURPS campaigns. In fact, any d20 game might be run in the same setting.