There's this hilarious Matchups: "Who will win in a fight?" thing at the photo-heavy Yahoo! Harry Potter site, where you can vote for who YOU think will win in a fight, e.g. Hermione Granger vs. Harry Potter, Cho Chang vs. Luna Lovegood, etc., and compare your answers to what others voted.
Some of the match-ups were pretty interesting. I think overall, I rated Harry, Voldemort, and Hermione the highest, as always beating their opponents. I discovered that I don't think much of Ron's magical abilities (perhaps influenced by just having finished Book #2 when he had a broken wand), and but have quite a high opinion of Luna (whom I picked as winning most of her fights). Also Ginny Weasley, of course.
Unfortunately not included were Neville Longbottom and Severus Snape. That would have been interesting.
Also, I came across this some time back: Top Ten Signs that Harry Potter & Hogwarts is in Malaysia [sic] which, though the signs are quite peripheral to the books, I thought it was hilarious. You have to be M'sian to appreciate it.
Finally, if you want to brush up on your European Fairy Tales, one of the best sites I found was Sur La Lune. I spent a pleasant afternoon revisiting the Twelve Swans, King Thrushbeard, and all those stories I used to know but had forgotten...
