https://secure.logmein.com/ offers a free VPN solution where one can set up one’s own virtual networks. This means one can link devices, on the Internet, as if they are on the same LAN.
LogMeIn allows one to invite others, to the VPN, and have those connections expire after a certain amount of time, or remain permanent (until kicked off or the VPN is taken down).
For gaming, this means games like ‘Ghost Recon: Advanced Warfighter 2’ should be able to see LAN servers, on the same VPN, as if they were on the same network. This should allow players to bypass GameSpy and connect via the old fashioned LAN server option, in -game, just like was possible in older games (where one could type-in the IP address of the game server).
It is worth checking this out.
[Thanks to Marc C. for pointing this out!]