i just installed psychostats on deluxe's wc3 server, not like ubernets, and its pretty ruff,
www.stats.deluxe.net.nz and i see some bugs here and there, but its a great little tool
edit: sorry wrong idea, you mean like a global scale psychostats? in other words, all servers running bf2ranks, gets updated to one site, ie
www.bf2ranks.com or something, in which to get the worlds best, just like real bf2? heck you could probably use a very similar design, would be fun
it'll be up to the people running the servers? to like update once a day or soo, and also they will download soo that a user has one rank around the world, it'll use a bit of space, unless you can load and save stats etc from straight off the website?