It allows you to share your Videos, TV, Music and Photos across the net. You install a small client on your local machine, and I guess the service does some sort of IP tunneling, and you gain access to your DB archived content from any web enabled machine with a Broadband Connection that can play WMP or Real Player content.
It works on the Mac from the web interface.
Anyhow...enough hububb...check it for yourself:
I am digging into it some more to see how I can share this content with others.
I love technology.