ALPHA WPMU Documentation
MU does require some experience with Wordpress and php Additional KSA's with Server Administration, apache server and mod_rewrite rules are a benefit.
Where do I change the default blog roll? or how do I change the invite message.
How do I set up invites? etc etc.
Plugins that are specifically for WPMU. And how to activate and use the included plugins.
Plugin Manager (Auhor/Developer: Samsonasu)
User Themes (Auhor/Developer: Samsonasu)
List All Themes (Auhor/Developer: Andrew)
Fimii WPMU Stats (Auhor/Developer: Fimion)
List All (Auhor/Developer: Andrew)
Rather then list every plugin that works, since in theory most should, lets list the plugins that required modification to work and what that modification was.
fAlbum 0.6.4 with a few small tweaks (mostly for the location of the falbum css)
Explains itself.
WPMU friendly themes.
How do I display the latest posts on my front page? How do I list all the blogs? etc etc.