Godardian--That was the last one. The new one is a paperback that has twelve stories from twelve unknown writers. Also, a number of "twenty minute" stories, or stories written in in twenty minutes, by some pretty well-known authors, Rick Moody and Jonathan Lethem among them.
One reason I like McSweeney's is because they publish stuff by first-timers who don't have agents or whatever and therefore cannot, would not be able to get published in a more well-known periodical.
I know what you mean, though, about not having enough time to read. You just have to pick and choose. I highly recomend picking up McSweeney's, though. In fact, the one you mentioned -- the one with Joyce Carol Oates, who contributed an awesome story by the way -- comes with a DVD that is pretty entertaining.