User blog comment:StickVentures2/Friend List/@comment-4578246-20120329205453

It might be possible through a complex series of CSS and Javascript codes, if you were really dedicated to make it work. Alternatively, if there is a high demand for this feature, Wikia might implement it themselves, either on the top of each userpage or on the right-hand sidebar.

There is apparently a feature like this on ShoutWiki, but not anything like this on Wikia (at the moment). However, I don't think this feature will really be necessary, and the message wall has already made Wikia a little bit like Facebook, so let's not go further.