what are my users doing ?

This question must have often been asked but i can't find any hack linking the Active Users to a page showing what these users are doing on the board.

This hack was made for 1.1.x but there were some problems with guests if I can remember correctly. Also, the code itself wasn't as good as it should but it was better than nothing.

Until now, if I'm not wrong, no hack like this was made for 2.0.

I can give it a try but it takes some time due to my work on more complex hack for vBulletin.