One of the sites that I follow, Hpaw.net is going to be playing through the game in the morning about an hour after it's released. They usually do 10-12 hours straight through a game, but I'm not sure they'll be able to for this one. Apparently, the game was said to come out at 9:00 pst on steam yesterday instead of 12 pst. They'll be streaming it on justin.tv's twitch.tv thing at http://www.twitch.tv/hpaw if anyone is interested to see how it plays or wants to watch them play through it.

It should be available at 12am PT.  The official website had an inaccurate countdown clock for some reason.    Also, the game is estimated about 20 hours long, so goodluck if they're trying to finish quickly....
 
I'll also be streaming the game tomorrow at 4pm PT, but admittedly in much smaller increments.  My mini-bio contains a link.