[White Lotus]

I've noticed a Facebook "Connect" logo underneath my username.
 
Looks interesting - what functionality does it bring? 

 

[PETEREK]

I'm also wondering this. So far, it only changed my Avatar to what my profile picture is on Facebook (I've since changed it back).
 
EDIT: below posts on the bottom right of the text editor it has a box you can check to post to Facebook "post?".

 

[Currawong]

It allows people to sign up using their Facebook profile if they wish as far as I know. It was active on the other Wikia-managed sites, just not Head-Fi until now.