V 0.10.0 Is out and it has one very cool little feature.
First, the big change is I a dded basic text search functionality. I do plan to followup and expand on search to allow one to take a search result and "translate" into the browsing functionality which contains similar books.
The cool part is if you are using the latest chrome builds, I think you need v11.x or even 12.x, if you click on the little microphone in the search box you can speak your search string.
All in all I found it pretty accurate. e.g., try saying "David Foster Wallace Infinite Jest".