I somewhat regret 이 not playing the game out to the end; it would have been nice to know the actual score. (I'm sure estimates will be available soon, if not already.)
That wouldn't have given you the actual score as AlphaGo didn't care to maximize the score in the endgame.
There have been a couple of brief discussions of this in the Open Thread, but it seems likely to generate more so here's a place for it.
The original paper in Nature about AlphaGo.
Google Asia Pacific blog, where results will be posted. DeepMind's YouTube channel, where the games are being live-streamed.
Discussion on Hacker News after AlphaGo's win of the first game.