It would be cool to get an "activity" hack, just for see how many times a registered user enter the UBB (with timetables) and so on.
Could be attached inside the "search/edit user" or could be CP's controlled for several options.
At least it even could be useful with boards with many users (i've got like more than 100 users who never joined my UBB since last 2 years)
Isn't it good?