Yesterday I just discovered something called grease monkey that works with firefox. It allows scripts to run that enhance sites that you visit on the web.
I modified a script so that now when I am looking at a book on Amazon it will put a link right below the title on Amazon that will tell if that book is available in my local library system and allow me to reserve it for checkout. The are currently scripts for around 40 different library systems around the country.
Most cool. Too bad I'm not that good with the computer--I still have a hard time putting in the gasoline.