What an amazing accomplishment, and even more impressive when you see that not only are there some heavy duty contributers, but there are quite a few others that have joined in to make the whole thing an astounding success.
Even better, what an amazing resource it has become. Personally, I'd say that it has become a wonderful entry point into public domain books, and it has been a joy to find such interesting books and hidden gems. And don't just go for the files... be sure to read the blurbs that are shared about the books as well. It really does add to the interest level.
Congratulations to all who contributed, and many thanks!!!!