Mod to show how many viewer on certain category

[elfreakz]

im looking for something like this :

Members' Introduction  (2 Viewing) (** the one in bold)

i found vBulletin using that, so i was wondering if SMF have this kind of mod.

[karlbenson]

http://custom.simplemachines.org/mods/index.php?mod=295

[elfreakz]

thanks karlbenson