I just thought that this was really kind of cool: author Andrew Tolson, who has a book coming out named "The Girl Who Saved Kafka," has started a tumblr called Kafka Girl. I thought this was cool because the tumblr is told from the viewpoint of the main character of the book:
http://kafkagirl.tumblr.com/
I don't believe the book has been picked up yet by any publishers, but it's definitely a neat way to go about marketing your novel as well as to develop a better feel for your character.

