I spoke to a few of you at the code4lib conference in Georgia about this, but it's finally up and ready for people to take a look. Open Library is an effort to catalog every book in the world, while keeping the technology and all of the data open to everyone.
After months of hard work by a very dedicated group of people, Open Library is now open:
This is a technology demo, so it doesn't have all of the bells and whistles just yet. But we're looking for help! If you've got data, we want it! If you're a programmer interested in helping, please let us know!
We have a series of pages describing our project and goals, a marvelous demo site that shows off what we're capable of, and a new series of mailing lists to bring more people into the project.
Please subscribe to the lists that interest you, poke around the site, and let us know what you think.