dang, you beat me to the punch -- I just saw that...!

http://pages.tvunetworks.com/doc/whatis.html

I'm only assuming that the user did NOT install the broadcasting application; or even if he did, the basic (free) service may still do the sharing thingy. We do have some pretty big pipes, it's possible that the system took advantage of it...

Mystery (mostly) solved. The IPs connecting to our guy all appear to be from DHCP major providers, and the data amount is all almost the same amount (the same program?) -- so it's all kinda consistant.

Thanks, anyway...