I think we've done a really nice job of seeding the site with questions and answers that will make experts want to participate.
Looking at the stats on area 51, 69 percent of those who committed as well as 49 percent of those that followed signed up for the private beta. I think that gave us enough unique personalities with knowledge to bring to the table to start what should be a rather nice, knowledgeable and helpful community.
Jeff and Robert, I'm wondering .. how did we do in private beta and most importantly where should we focus on improving during the public beta?
Personally, I think we need to work a little more on tags, as well as our own promotional tools (even though Stack Exchange will be giving us some great stuff to use).
This was not a feature request :)