In my opinion, who's online is useless for classifieds...., I don't give a ... either, if someone is online in the gallery
More important would be a portalblock, for example.
With rotating ads, like nickvergessens galleryblock.
Then it would be a "nice to have", if it is possible, that there are 2 userlevels for adding ads.
Some Boards have supporters, which support with money or by making special deals for the stuff, they are dealing with.
To give them the oportunity, to advertise with their special offers, it would be usefull, if these usergroups
would get a separate userlevel.