PaidContent has a copy of Google’s motion for summary judgment, and a summary of what it says. Google makes the case that its scanning of all those copyrighted books qualifies as fair use, and cites numerous examples of beneficial outcomes that have come out of the availability of that information to be searched. It also insists that inclusion in the search has been beneficial, not harmful, to sales of the books it has scanned, and even well-known literary agencies like William Morris recognize that.
The Authors Guild was expected to file its own motion later today, but I haven’t seen any signs of it showing up in the news feeds. At any rate, no matter what either side says, after the last few years of the lawsuit, I highly doubt that Judge Chin is going to dismiss the case without bringing it to trial. But as with any lawsuit, both sides have to go through the motions (so to speak) regardless.