APCMag writes about a very interesting feature in Microsoft Windows Vista called “Windows Internet Computer Name” based on the IPv6 protocol, an enhancement of Windows XP’s “Peer Name Resolution Protocol” (PNRP).
Using this service, any Windows Vista computer with a dynamic IPv6 IP address running the Windows Internet Computer Name service would be accessible from the internet using a domain-like machine name without having to buy a domain name.
That would mean endless benefits like hosting and accessing files, media, documents from the internet anytime.

Here’s how Peer Name Resolution Protocol works:

1) Your PC has an IPv6 address. IPv6 addresses are, by design, accessible to everyone on the public internet, because there’s a practically unlimited number of them available (unlike IPv4). 2) You specify a name for your computer, and PNRP makes that available to other computers on the internet, allowing them to connect directly to you.