Just some recent links to interesting information and activities for the Lego Mindstorms NXT
1. 71 Things to do with data logging ( since NXT-G 2.0 supports data logging )
http://www.marshall.edu/LEGO/Tufts/71ThingsToDoWithDataLogging.html
2. Hardware specs for the NXT and the sensors are available from http://mindstorms.lego.com/Overview/nxtreme.aspx
3. Wichita State Mindstorm Challenge 2009