I made a change to the Who's Online Addon Extension to incorporate the color of a SMF user's group.  This change displays each user's name in the color that corresponds to the user's group similar to the member center at the bottom of the SMF forums.  This is a selectable option in the mambo module admin configuration screen.

Only issue I had was that I was unable to get the mouse-over help to work for this selectable option in the mambo admin, and I'm not sure why.  Some help on that? 

I have tested this on a site with only SMF, not PMS, CB, or FC.  However, no changes were made to those sections of the code.