you have surely already heard something about Skype, the P2P telephone tool. we tested it this morning (between France and Switzerland) and it is really working great!! the sound quality is better than the one with cell or fix phone, definitely. No latency appeared. And…last but not least, no “special” configuration to do, although my contacts and i were behind firewalls / routeurs / proxys :-) i must say, i am impressed.

skype beta v0.97.0.3