I was worried when I heard all the no-book talk on the stackoverflow podcast; it makes me glad to hear your defense of books. Websites are great for answering specific questions, but books are great for an in-depth command of a subject.
Take Javascript for example. Here is a fast moving technology where the most cutting edge stuff is being documented in blogs. However I would not understand closures as well were it not for David Flanagan’s Javascript Definitive Guide. Upcoming Javascript books from John Resig and Douglas Crockford are sure to continue this trend.
On the .NET side, Jeffrey Richter’s Applied Microsoft .NET Framework Programming is indispensable. The list can go one and on; every subject matter has its books like this. However, books of this caliber are rare. For every one of these, there are 50 “teach yourself XYZ is 24 hours” quick-buck books.