Good Chess Puzzle Websites?

I recently introduced my husband to Futility Closet, an interesting little blog. His favorites were the chess puzzles, and he asked me if I knew of any other good websites with puzzles like those. I don’t, but I figured some of you folks might.

So anyone here know of any good chess puzzle websites?

The chess players and the puzzle people all hang out in the Game Room, so I’ll move this from IMHO thither.

chess.com and gameknot both have daily chess puzzles, of varying quality.

On a side note, Futility Closet is a great website. I check it every day at work along with Not Always Right.

Chess Tactics Server
ChessGames.com (a puzzle on the front page each day)
Shredder Puzzle of the Day (3 puzzles each day)