Remove the Chat Heads count limit in Facebook version 6.4+ (Only 4)
However the chat heads won't enter a new row if they reach the maximum display width on screen so the truly limit your chat heads count now is screen width.
(For iPhone/iPod users) Including "Facebook Landscape" option in Settings to make your facebook landscape and then you can have more Chat Heads count because your screen width is increased !
Requires iOS 5.0 or higher and Facebook app version 6.0 or higher.
Works in iPhone/iPod/iPad
Configure from Settings.
See larger Screenshots below..