I'm curious myself. I see the ping counter that says how fast the page loads, the version history for ACC, and then a clock that counts down. I don't remember that being there, but I think it's on every page. I'm gonna test it.
It looks as if it's supposed to end on November 7th at 8:00pm. Coincidentally in a user's signature, it said "Hybrid Heaven - 7 years of fun - November 7, 2009 to November 7, 2016". Is ACC closing down on November 7th?!