Now, you (or our parents) have an additional option! LEGO Shop@Home is now offering the NXT Idea Book in the Fall/Winter (you know, Christmas) season catalog. In case you missed it...find it here on page 43 within the 2 NXT pages! Same goes for the print version if you received a copy.
The NXT Idea Book really is a nice way to expand your NXT experience. Enjoy!