Firefox users might be interested in trying out LibX: Gustavus Adolphus College Edition. FBML has a nice summary of the extensions main features. One of my favorite features is the ability to see whether Gustavus has a book that I discover while visiting Amazon.com–why buy it when you can check it out on campus (Thanks, Dwight).
This is a great feature. I have a Butler hotkey set up for a search engine of the library, which is nice because I don’t have my browser open to do the search, but the LibX is even more convenient. Thanks for the info.