You could define 5 profilefields and 6 steps the user have to get done before the widget is hiding.
If you like that, come and visit my forum: vbulletin-forum.de
This is a very old mod I had created years ago ...but it is still working in vB 5.5.0!
There are not that much options for styling and you have to change css in one of the css-templates.
So hope you like it!