I watched part of Sarah Silverman's Jesus is Magic last night, just to see what it was like. I only laughed once, at (this is paraphrased) "Jesus turned water into wine, and I think he made the Statue of Liberty disappear in the '80s." I didn't laugh after that. I turned it off after a half-hour.
(Why is it, though, that I was cracking up at Dave Chapelle's stand-up before that, even though he's foul-mouthed as well?)