Thanks for the heads-up, Dbat; my DD is actually getting to the age where it's not such an issue for her (or is it me?) any more. She was literally laughing out loud at that site.

Thought of two more, not humor, but humorous- the Bertie Wooster books, and stuff with lots of nice wordplay, like the Phantom Tollbooth. My kids also love the sort of throw-away scholastic books like "F in exams" and "F for effort"- silly but fun. Also Lynn Truss' books, especially "Eats, Shoots and Leaves" (but you need to like grammar, or at least not mind it).