I found this site, and it actually runs off Drupal, but I am wondering how to go about do the CB so it works like this. This guy's community site is so smooth and cool-looking, I'm nearly [I don't want to be so blasphemus here] considering switching to drupal.
Check it out:
adrenalinehub.com/
Does anyone know which plugins/etc I would need to facilitate something like this?