Appendix C of the book lists a number of useful LEGO websites, both official and unofficial. You can access those same links here. Note that some websites have since become unavailable and are no longer listed.
- Books ‘n’ Bots: LEGO MINDSTORMS NXT Books
- LEGO MINDSTORMS
- NXT Programs: Fun Projects for your LEGO MINDSTORMS NXT
- Peeron LEGO Inventories