I have searched after some plugin that realy would make wpmu complete:
Simple plugin showing stats for each blog (hits)
More frontpage templates with ready to go plugin showing posts, top posts, recent comments etc allowing to show
avatars and gravatars.
Plugin that shows popular bloggers on the frontpage in nice frame with their avatars like wordpress.com
Embedding video is there other plugins than vipers video??
Today you have to get a lot of plugins to make the site complete
If anybody can make a plugin package with just one install and then chose what you want for your wpmu site...