Authors Guild Sues Google

I predicted this several months back. While I totally agree with Google's defense as articulated in this post, there is clearly a fine line here. This issue is not so dissimilar to copyright issues surrounding music. Is it OK to copy a book, as long as you don't distribute it? What about using the underlying information from copyrighted materials to answer questions? I do wonder if the Authors Guild has adequately thought through their issue with this...on the surface, it seems to me that authors stand to benefit significantly from Google Print.