This went from rumor to “confirmed likely” in posts and comments by Jason Calacanis and Jordan Running (also here) (both now at AOL). A comment in the last link suggests that the new service will be open to non AOL members.More info over here.
This market is red hot. Mature players like Facebook and Fox-owned Myspace basically own their respective categories, and better-featured (and funded to the hilt) newcomers like Tagworld and Tagged gunning for the big guys.
AOL preparing MySpace killer?

TechCrunch claims AOL is working on a MySpace-like social network called "Head On". A launch may follow within a couple of weeks: