Him and Michael Showalter aren't too great with stand-up. I don't think they've both been doing it for too long and are more familiar with sketch work. I still think they can be funny doing stand-up but no where as funny with Stella or the State.
Humor's subjective, of course, but I think Showalter's pretty good at stand-up. I've seen him live twice, and he didn't fail to crack me up either time. His album, though, is terrible. Really really terrible. I think it might be because his best live stuff is all improvised, just feeding off of the audience and hecklers. You don't really get that on the album except for the cat thing, and even that's not him at his best.
Black isn't nearly as good, but he's not bad.
Sorry to be so off-topic. I'm planning on seeing Wall-E this weekend.