Best social media networking initiatives for a VB forum?
 

I am asking for suggestions for social media features that would make a forum TOTALLY integrated with social networking.

All I have right now are the following social bookmarks at the bottom of thread pages: Twit this! del.icio.us StumbleUpon Faceboook. I feel this is kind of weak now. I bet not many people even see them there...

So* how much can a VB forum REALLY ROCK with this stuff?

Facebook Connect?
MySpace links?
Twitter links?
Others?

My forum crowd are:
80% on Facebook
50% on MySpace
30% on Twitter
A lot on iPhones & Blackberry's

Can you please suggest how I can drag a forum into the social media decade?

What would the BEST combination of social media tweaks I could make to the forum?:

Many thanks in advance http://www.vbulletin.org/forum/images/smilies/up.gif