Website on personal profile?

I suspect many forum users have some webpages / site of their own that they wouldn't mind / like to 'advertise':

• Personal site
• Favorite site
• A link to their current eBay offers or own webshop
• Some user group they're part of
• etc. etc.

Is it possible to add such web address to your personal info? If not, could that option be added?
IMO it would be best if it shows up when you click on a user's name in the forum, and it should also show when the user doing that, isn't logged in (because website addresses are -normally- very public info anyway).