Some other puzzle sites:

• Cryptopop's Zyptograms
  Short, clever, and challenging cryptogram variants to puzzle you. Updated weekly.
• Leicestershire Dyslexia Association
  Free wordsearches to print or play online.
• pzzls
  Pzzls, puzzles, riddles and brainteasers to excercise your brain!
• Sudoku
  The site gives free daily Sudoku and information and forum. The site has an excellent newsletter, which is very popular.