Scrabble-izer
Ever wanted to send someone an online message spelled out in Scrabble tiles?
Use Scrabble-izer!
After you've Scrabble-ized your message, you can email or post the URL. For example, Bill (the author of Scrabble-izer, I think) once posted an idea about mashing up Scrabble-izer with Twitter.
(Btw, I'm guessing that Bill doesn't save or read the messages that people create, but I haven't asked him so I don't know for sure, and the messages could probably be reconstructed from a log somewhere; so I don't recommend using this for anything illegal.)