Xbox as a pivot point

I read some article a while ago, through slashdot or perhaps Hacker News, about how a skilled attacker had compromised a company network by attacking an Xbox console and using it as a pivot point in the network. So far as i can tell, there is no documentation on this. ANYWHERE. And i've since lost the article. Regarless, the idea seems awesome. How many people install a firewall on their Xbox? None! Because you cant!

Hack the planet!