Drupal
I have been learning about drupal open source software. Its an open source solution for creating community based websites. An easy comparison for purposes of explanation is wordpress. Wordpress is based on the single user concept. However many times that is not the best model. Imagine ebay with only 1 buyer and that same person is the only seller.
What "community" can be inferred from poopreport.com . The page linked shows user generated page content. The drupal plugin User Points is used to keep track of how many posts a person has made and allows readers to click into other stories written by the user. I assume it allows the readers to rate the page content also.
Some other sites that use this module:
