The article was on several websites and I think on IGN they said that they were running the games on their original Xboxes not the 360. And yeah, you can leave your computer running for a long time. Mine is actually running 24/7, but after being idle for about an hour or so it goes into standby. The Xbox doesn't as far as I know. The service was shut down April 14th, that's 16 days now

I wonder how they managed to stay online without being disconnected. I don't know about the internet providers in the US but in Germany for some reason you are automatically disconnected after 24hrs of constant connection. You can log on again right away but that wouldn't help the Halo 2 people.