There is one thing this site seems to be missing: an "under construction" icon, preferably in the form of an animated GIF. :P Because of this omission, I can only give it 4/5 stars, just for reminding me of the days when something like http://oreilly.com/catalog/9781565920637 was what passed for a way to find stuff on the internet.
http://shop.oreilly.com/product/9781565920637.do#top