Bottle Opener

Bottle Opener

 

Festo Collection

Here is a collection of robots made by the German Company Festo.
Not NXT, but it may inspire some of you to make something similar.

 

Voice Control Wheelchair

I have found a voice controlled wheelchair, which uses the sound sensor for the first NXT set and some RobotC programming. It is able to tell the difference between a "dit" and a "dah" kind of like the morse code.
Then is sends a signal with a NXTBee sensor to the wheelchair top make it move around.
Here is a video explaining the wheelchair.
 

Robot Virtual Word

Robot virtual words, is an simulated environment in which you can program your NXT.
One of the great things about RVW, is that you can write programs in RobotC, test them out on a virtual robot in the simulator first before testing on a real robot.  A very handy tool to have especially if you're using it in a classroom where you only have a limited number of robots to go around.

The new update includes handy features such as;

• Measuring tables - virtual table tops where you can calculate how far a robot travels based on wheel circumference
• Light Sensor testing tables - As your robot drives across these virtual tables, the sensor will give actual readings depending on the colour 
• New Navigation challenges - Billiards and Mini-Golf

 
You can get a 60 day trial download from here if you want to check it out - http://www.robotc.net/download/rvw/

Single licence is $49 for a year, with costs coming down if you getting enough licences for a classrom.

Bonus Models

Here are the (so far) 11 bonus models to build for the NXT 2.0
http://robotsquare.com/2012/03/03/tutorial-official-bonus-models/#11
It's a good way to get ideas, and start off if you just bought the set.
#1M.O.R.P.H
I'll have to say this is one of the more complicated builds and programs.
#2Llama
This one is easier than others, and also very entertaining for younger children.
#3Manty
Also quite simple, but very fun and children may also like this one
#4StoneHenge
More complicated build and program.
#5Segway with rider
Easier build, programs pretty simple too.
#6NXTitzki
Children like this one, a little harder than Manty and Llama, but easy programming.
#7ArchFish
Another kid-friendly build, simple and fun
#8TriPod
More serious build, but interesting and pretty simple
#9MindCuber
Great build for those who want thier rubix cubes solved. Complicated build and program
#10Pinball
Simple and fun build.
#11Color programmable car
Easy build, more complicated programming.
Videos:
Here are some videos done on the NXT
Not all of these videos where done by the maker of the Models

1# M.O.R.P.H

2# Llama

3# Manty

4# Stonehenge

5# Segway with Rider

6# NXTitzki

8# Tripod

9# MindCuber

10# Pinball

 

MindCuber solves VoidCube

"MindCuber can be seen here solving the Void Cube. It is essentially
a Rubik's Cube with holes through the center of each face, which makes
it slightly more complex to solve. The description on the video itself
says a little more