Unglue.it has launched.
Here's an excerpt from the Frequently Asked Questions:
Unglue.it is a place for individuals and institutions to join together to give their favorite ebooks to the world. We work with rights holders to decide on fair compensation for releasing a free, legal edition of their already-published books, under Creative Commons licensing. Then everyone pledges toward that sum. When the threshold is reached (and not before), we collect the pledged funds and we pay the rights holders. They issue an unglued digital edition; you're free to read and share it, with everyone, on the device of your choice, worldwide.