I don't think we'd want to add that to the current forum software, which is quite convoluted as it is. It might be supported by the next generation forum software if and when we move to it, though.
Until then, you're welcome to create a page about yourself in the wiki, and add "CategoryHomepage" to it, so that it's listed on the CategoryHomepage page. Then you can link to it from your UBB profile page (or put the link into your signature). [ May 21, 2007: Message edited by: Ulf Dittmer ]