Mark Bergsma wrote:
$ dig wikipedia.geo.blitzed.org CNAME
It will give an answer to either squids.fl.us.wikipedia.org, or squids.fr.eu.wikipedia.org, depending on your DNS resolver's location. These DNS targets are fictious at the moment (the .fr squids are not on their final colo location yet), but it's just for initial testing.
Perhaps I should add that it is currently setup to send all european visitors to the .fr squids, and all others to the existing servers in the US...