I'm pretty late to this whole party, but I've been quite impressed lately with goodreads.com. If you're not familiar with the site and are a reader it's an incredibly useful tool. You can make a profile then rate as many books as you like, just like Netflix. GoodReads displays other books similar to your taste and often has very spot on recommendations. Plus, it keeps track of books you've read, what books you are currently reading, how far you are into them, and what books you want to read. Simple and useful. I highly recommend it.
After a bit of work I got The Success of Suexliegh up there too. Check it out.