Though not spelled correctiong Diddit, is a promising social venue based on allowing its users share lists of things they have done. For me, this kind of beats some of those blog tags and questionnaire chain mails floating about cyberspace. Besides clicking (checking off) what you have done, you can also specify on things you would like to do. Pretty nifty, huh? 🙂 Also, if something is not listed, then you can add an option.
For some, it might not be worthwhile, but I thought it was fun, and very addictive after I signed up. It actually took away from my Twitter time. If you join, tell me about it and share your ID so I can check out your list. I even shared a few stories of my experiences, especially one unique thing that I rode a roller coaster as one of the first 100 before the park even opened (Millennium Force, Cedar Point.)