http://googleblog.blogspot.com/2009/01/ ... t-lab.html
Posted by Vint Cerf, one of the original people working on and deploying TCP/IP...
I'm kinda surprised that something like this hasn't been done already. I'd think that it wouldn't be too hard to just hook up a bunch of universities to this project and get pretty good geographic coverage that way. Heck, it could probably be bundled into bit torrent implementations as a diagnostic and you'd get awesome coverage virtually everywhere, especially at universities.