Check out this website: Booksfree.com.
I think it's an interesting idea, but I have a couple of questions:
1. Why would you choose this over the free public library? I suppose you can pick your books sitting in your jammies and don't have to make it over to the library in person. If I were still working outside my home would that have been enough to entice me to sign up for this service? Hmmmmm.
2. Why call it Booksfree, when at the lowest subscription level it costs $7.99 per month. And could you not buy the latest books cheaper than that at 1/2 Price Books and simply give them away if you didn't want to keep them? It seems that there are many copies of the latest stuff at 1/2 Price, but again, you do have to actually GO there and pick it up.
Hmmmmm. Most of the avid readers I know love to haunt book stores and libraries--fondling the books, reading the covers, etc.
Now, if you were elderly or homebound I think this would be GREAT. But are there enough other people to make it work?