It depends on the group. Really, it's all about what the guys want to play when they come over. I'd be perfectly happy playing Magic: the addiction, if that's all anyone wanted to play.
Am I done with 3.x? I think I am. I've been the groups DM since we formed up. Aside for a couple of variants my players each wanted to attempt to run, I've been the one to do it all. I've been through with 3.x for a while now.
So much so that after our winter break I convinced them to give other games a try. Lately its been SilCORE. I enjoy it. Next month, the rest of our group splits. By the time I have a new group (if ever) 4e will be out, and I'll have a chance to see it in action.
If that's all they want to play...
Right now I am also in an online 3.x game, and our DM is converting us over as the rules are previewed. So by July I wont likely even have a 3.x game going in any form.