Presenting . . . The Literature Map! A snazzy little website where you can plug in an author you like, then it displays a cloud of authors similar. The closer the author, the more similar. It's pretty keen, although they do need a little editing (Jane Austin?), and it's kind of fun to follow your own literary tastes through all the different clouds it generates. It's not snobbish about kidlit or genre fic, either.
Thanks to Throwing Marshmallows for the link! What fun!