I'm not as much an expert on literary blogs, but if you could find a few that have some good traffic it would probably be worth your while to see if they want a copy to review. I'd look for ones that have a lot of comments flying back and forth. Even if they don't have as much traffic, participation would probably be better than just random hits. And, hey, if it sells a few books I think its worth it -- the key is to start the grassroots chain-effect
