Safari Tech Books offers "Rough Cuts"

Safari Tech Books Online, a substantial eBooks collection with techie books galore, Safari, launched a "Rough Cuts" service a few days ago (in beta, but of course).  Rough Cuts feature lets readers get a preview of not-yet-published manuscripts.  From their news release:

The initial version of a Rough Cuts book will not be fully edited, subjected to final technical review, or completely formatted. Similar to the nightly build in a software project, the Rough Cuts PDF is updated every time the author and editor make changes as they progress toward the finished book. Using the Rough Cuts service's built-in Notes feature, readers can send feedback, suggestions, bug fixes, and comments directly to the author and editor."

Funny that my library subscribes to Safari, but instead of getting a press release from the company, the first I heard of this new resource was on ResourceShelf.