From the Electronic Frontier Foundation:
The central question in the privacy debate that EFF and our partners at the ACLU of Northern California and the Samuelson Law, Technology & Public Policy Clinic at UC Berkeley have been having with Google about Google Book Search is whether this exciting new digital library/bookstore is going to maintain the strong protections for reader privacy that traditional libraries and bookstores have fought for and largely won.
That’s it. All we want is for Google to promise to fight for the protections you already have when you walk into a bookstore or library.