Facebook Connect/Authentication and Authorization
Display a Facebook Connect button, administrator can put the button to anywhere, just need copy one line codes.
The user clicks the button to log in to your site with Facebook account. 
After log in, user need input email address to complete his account.
User can invite his Facebook friends to your site
The Facebook permissions dialogs appear allow user set permissions for publishing Feed Stories.
Then user can do anything like normal register user on site.
Logging out and disconnecting Facebook at same time.
Invite Facebook Friends
Every members can use the page to invite their facebook friends to your site.
Publishing Feed Stories to Facebook
If the user chooses to publish something from your site directly to his profile with the Facebook permissions dialogs at the first time, the actions will publish feed stories to facebook wall.
User joined your site.
User upload a photo.
User post a blog.
User upload a song.
User upload a video
More coming…
Administrator can:
Facebook Connect Button Size
Enbale the popup window to info user the Facebook fedd publish successfully.

For more details, please click here.