Martin Berkhan on LeanGains posted about this interesting website for logging workouts and having fun doing it.
In case you're interested:
* Link to the website: http://www.fitocracy.com/
* Link to Lean Gains article: http://www.leangains.com/2011/11/fitocracy-invites.html
It's not open yet, but if you can find a way to persuade someone to give you one of their 10 free invites, you're all set. I missed it, otherwise I would be offering mine.