I check my referrers regularly, and I've been getting a lot of hits lately from a German magazine called LinuxUser, some info in English. It turns out they just ran an article on Bookcase in the March edition. Wow! The Google translation gives me an idea of what the article says, very fair and even a bit complimentary.
Two comments I have. First, Bookcase version 0.5 should be out shortly, and I have added search capability, which answers one of their wishlist items. Second, from their screenshot, it appears that for books with multiple authors, they have separated the names with a slash ('/'). If they would use a semi-colon (';') instead, then Bookcase would automatically split them individually in the group view. I may email them about that. But it's so cool