Welcome to WPMU DEV, this is a blog dedicated to posting news, tutorials, plugins, themes, hacks, tips, etc… related to WordPress MU. What’s WordPress MU?
WordPress Multi-User (WordPress MU) is a fork of WordPress created to allow simultaneous blogs to exist within one installation. WordPress MU makes it possible for any one with a website to host their own blogging community, control and moderate all the blogs from a single dashboard. WordPress MU adds eight new data tables for each blog. (Wikipedia)
[Archival post, retained for posterity]