After I removed all of the duplicate entries (quite a few! I think people assumed there were technical problems when there weren't) I went over to Random.org and drew the names of Wendy Koehler and Sandra K321. Wendy and Sandra, hope you enjoy the book! Congratulations - I'll be in touch via email.
Thanks to all who entered. As a sidenote, I'll be sticking to Google Docs for any upcoming giveaways I do. Seems easier for everyone, and it means you don't have to post your email address on a public site.
It looks like I'll be buried in review books for the immediate future... I just got three assignments for a May 10th due date (halfway through Enid Shomer's The Twelve Rooms of the Nile at the moment), and I turned another review in today for Victoria Hislop's The Thread. Fortunately, these are books I'd wanted to read anyway. All are lengthy novels, but at just over 400pp apiece, none qualifies for the chunkster challenge unless I count authors' notes and glossaries... and I think that's probably cheating.