OverDrive.com is great, and I have only accessed one part of it. I use it to rent audiobooks from my local library that I listen to while I'm working or working out. When I listen to audiobooks, I usually listen to professional development or self-improvement books that motivate me, open my mind, and don't require me to listen to every single word. In addition to audiobooks, OverDrive offers eBooks, music, and movies. You can get started, see what it can offer you, and download it--All of this for FREE as long as you have a library card. Just check it out, and see if it's for you!
If you're interested in using OverDrive for your personal use, go to OverDrive.com and look on the left side of the page. There is a place for you to enter you zip code. Click on your library and get started. You will need to download the OverDrive Media Console, which you can find here (for FREE): http://www.overdrive.com/software/omc/
Here are more instructions if you need or want it, but I think the Web site does a good job of telling you what to do: http://www.mvlc.org/Overdrive/howtouseoverdrive.pdf
I recently discovered a portion to OverDrive that is for K-12 students to use at school or in the classroom. Would this be helpful in your school, or do you already use it? I'm curious--please let me know!