This is such a great idea, I can't believe someone didn't think of it sooner! I'm usually about six months to a year behind what's tops on the bestseller list (just take a look at the sidebar), since I rarely buy new hardbacks, instead placing holds at the library. I originally found out about the list from an article in today's USA Today.
Speaking of libraries, my local library is closed for two weeks as they prepare to move into a brand new building. The current library is in a very small, two-story building that used to be a bank and there are only about five street parking spaces available. I'm sorry if it sounds incredibly geekly, but I'm very excited about the opening of the new library on June 26th. In the meantime, I'm visiting another local branch in the area which is also in a fairly new building and it's saving me on books I normally would have ordered (for a $1 each with the new fee system) via ILL, so I don't mind the wait until the 26th.