Well, my group alternates between a number of campaigns. At the moment they are all D&D.
We just wrapped a Greyhawk campaign where we all played uber-powerful undead guys. Eagle Prince ran it. It was fun, but now the world of Greyhawk has been turned into a desolate wasteland.
I just put the campaign I was running on hold. It was an Oriental Campaign set in the Underdark. Which I thought was cool before people at WotC started making oriental underdark figs. But since I've started school, I've had to put it on hold. I just don't have the time to create adventures during the week.
Instead I've decided to run through the premade online adventure on WotC's website, and others that I've found. I'm using Mystarra as my generic setting. It takes me between 10 and 15 minutes now to prepare for a session.
Harbinger is still running his low-magic home-brewed campaign. This is quite the feat considering the number of times the players have completely fumbled, thwarting his carefullly laid plans.
We keep talking about running a Mutants and Masterminds campaign, but it hasn't happened yet besides trying an odd adventure or two.