You can sign up in like 30 seconds including email verification if you already have that up in another window. Then you just list ten books you'd like to get rid of if someone requests you ship it (at your shipping expense) and then start requesting books for yourself right away! You get two books to start with. You can select from a HUGE list of books people are willing to ship off to you. With each additional book you list or send off you start accumulating credits you can spend on "free" books. I put the free in quotes because you will be getting credits by listing and sending off old paperbacks to others who are also participating. Generally about 3 bucks to ship these so you'll end up saving hundreds, if not thousands in books each year!
There are a few rules, like must be readable and have both front and back covers, but it seems generally relaxed and awesome! I'll have more on this bit of WIN as soon as I receive my first book! I joined yesterday, I'm putting my books in today, and I'll write the follow up to this blog as soon as I ship or receive my very first paperbackswap.com book! UBER excited!
Have a wondiferous night ladies and gents!