Comics

Supernating Superdudes
Players create a superhero based on themselves, create a trading card and then participate in various competitions against other players.
http://www.superdudes.net/

Young Just Us Teen Titans.
[Messageboards] Superhero roleplaying based on DC comic characters. Rules, forums, available and taken hero listings.
http://s4.invisionfree.com/YJUTT/index.php