Nice post!

We might also add "reward system" to your list. We've found that it's a powerful way to encourage participation. Attaching points to the aspects that are most important for your community has been one of the features our customers have pointed to as the single biggest impact to the quality of their community.

Be built Clearspace and Clearspace X to address everything you've mentioned in your post. If you're not familiar with it, please kick the tires. You can find it on our site at www.jivesoftware.com.

Cheers,
Sam Lawrence
Chief Marketing Officer
Jive Software