John Bambenek, an academic professional for the University of Illinois, wrote a nice review of the second edition of an O'Reilly book entitled "Google: The Missing Manual" by Sarah Milstein, Jude Biersdorfer, Rael Dornfest, and (whew!) Matthew MacDonald.

In keeping with the 2nd edition's release in March, 2006 (covering all things Google) there is a new chapter on Google Analytics.

John had this to say about Google Analytics in his review:

However, the most interesting chapter is on a tool not yet publicly available (you have to request an account and they grant them on a slow but ongoing basis), Google Analytics.

Google Analytics harnesses the power of Google to get the most data and statistics out of your website visitors. It helps you know what keywords work, what your visitors are interested in, and what pages are or are not popular.

Of course you and I know Google Analytics does so much more, but IMO a nice marker of something that is making an impact in the technology space is when it gets written about in an O'Reilly technical book/manual.