Do you know an open source PHP project which be like www.orkut.com or www.gazzag.com? The idea is very simple. You recives an email from a friend who's already in the site and then, you can follow the link on the email and register in the site. After that it's possible to upload your picture and write a few lines about what you like and ... Anyway, there's no benefit in inventing wheel again, so I want to know if there's a project on the net ready for download and install.