The book is a bit outdated, but there is nothing anybody can do about it. By the time a book is written, edited, published and finally available for purchase at your local book store did pass so much time that is measured in Google or Internet time a small eternity. Every book to the subject is by default outdated by the time you can buy it.
However, as long as the book provides general truth and methods in addition to specifics, long time value is still guaranteed. I would say this is partially true with this book. It does focus on specifics and most stuff is still true, but a lot of stuff changed since then, in some cases dramatically.
I use Google for years now and consider myself very Internet savvy, especially when it comes to search engines and even I learned some nice tricks from the book.
It comes in handy sometimes and I am sure that it will be useful for a few more years to come, but I would not expect too much from it. I have not found any better book in print format yet, but the best place for this kind of information is actually the Internet itself.
Still, I love to have a print version around. That's may be just me being old fashioned, but I am sure that I am not the only one out there.