I haven't read any of his books, but I do have a book by his whacked-out sister, Amy Sedaris. She is a freak...I love her!
I certainly wouldn't want to see any gay content in my kids' school assignments, but I wouldn't mind reading Sedaris's "clean" stuff for myself if he's as funny as I've heard.
Amy S. is one of the funniest actresses/people in general alive. The book you’re talking about must be I LIKE YOU:
Hospitality under the Influence. Totally hilarious. I dare not pick up a copy when I’m at BORDERS, because every page starts me chortling, and drawing attention to myself.