Social Networking, Classmates Like Site

I need to clone features of [login to view URL] . Basically, I'm building web site similar to [login to view URL] -- a place where former classmates will be able to find each other (look by city, than school, than graduation year, than class), and build their group (based on their class in school). phpFOX, Delphi, iScripts or any similar software is ok to be used, as long as you can customize it to meet my needs (and requirements). Site design to be simple, fast loading, not too many features required. Again, pretty much [login to view URL] clone, that's the best way to describe the project.