WordPress MU

hi,
is there any "user online indicator" that is working through wpmu???

searching in the forums, i found ...

http://mu.wordpress.org/forums/topic.php?id=3086&page&replies=22#post-18587

does anybody uses this hack? does it work for the current version of wpmu??

so far i am using a modified verson of a bbpress online-now plugin, but it only displays users online at the homepage of http://blogono.com

it would be very nice to have a sitewide-solution with members-online (+link to their profile) & guests-online

An idea for the WPMU plugin competition maybe?
http://wpmu.org/plugin-competition-ideas/

There's a premium plugin that does this for users.

It just shows numbers though, not who exactly is online.