XUP (XML User Profiles) are now implemented in e107.XUP (XML User Profiles) are now implemented in e107. What they allow you to do is very quickly register to e107 powered sites using a small XUP file that you generate and store on your server. If you update the information in this file, your information in every e107 powered site will be updated without you having to do anything. For more information, and to generate your personal XUP file, please go here.
e107 is open-source and of course, free. None of the developers of this software are paid, but donations do help to cover our monthly dedicated-server costs. If you like and use e107, please consider making a $5 monthly donation. Every little bit helps and is greatly appreciated. Thank you.