Jon Udell at InfoWorld has written up instructions on how to create a bookmarklet to check your local library’s inventory for a book you look up on Amazon. It’s a little tricky, but John has a video tutorial on how to do it.

I managed to create one for my local library here in Atlanta, since there wasn’t one predefined. You can drag this link to your bookmark toolbar (see Jon’s videos on how to do this if you get stuck). Also, here’s a great tutorial at Don’t Try This At Home.