I've just discovered the coolest thing ever for book hogs like myself: Library Elf. It's a web-based program that keeps track of library loans and holds. I told the Elf what library I frequent (I chose from a menu of every US library) and entered my library card number. A few days later I had an email telling me that one of my book requests was in and which books will be due in three days. It's AWESOME! Check it out!