Earlier, I wrote about Facebook's homepage promotion of their friend importer tool ("Friend Finder"). Those screenshots were of a module placed prominently above the Facebook newsfeed. Now I am seeing a similar unit - with similar copy and friends' faces - in the premium ad slot. The messaging is slightly different: Above newsfeed: Ryan, Who's Missing? Hunter, Justin and Anette tried the automatic Friend Finder and found out.
In ad unit: Ryan, Try the Friend Finder: Hunter and Jed found friends using the Friend Finder. Give it a try!