WordPress MU or multi-user, is designed to do exactly that. Is a version of WordPress that can be used to run sites like WordPress.com.
BuySellAds is finally out of the private beta with such a huge list of new features that just made my life as an ads publisher a whole lot easier!, ok ok this a non Wordpress Article, but you should have in your site BuySellAds for really pro monetization service in your WordPress blog (or any blog engine).
WPscoop is a social news/bookmarking site dedicated to the WordPress community and functioning much like the popular digg.com website. Members can submit WordPress related content to WPscoop and other members can then vote upon or discuss these items. When a submitted article reaches the required number of votes it is the promoted from the Upcoming section of Wpscoop and placed in our published news section (frontpage).
WpVote.com, the social bookmarking site for WordPress fanatics. WpVote is a digg-like site dedicated to everything about WordPress, as such as Themes, plugins, news, ressources and hacks. WpVote allows you to submit an article that will be reviewed by all and will be promoted, based on popularity, to the main page. When a user submits [...]
