What is a Sun SPOT? Project Sun SPOT (Sun; Small Programmable Object Technology)
You can learn all you want about a Sun SPOT here: http://www.sunspotworld.com
I have seen numerous demos and applications of this cool little gadget. It is wireless and full of different sensors that you can program to do about anything. The cool thing about a Sun SPOT is you program the gadget using Java and its wifi enabled. Going with Sun Microsystems tradition, Sun has this device available to everyone so there is no limit to what this device can do. It is only limit to one's imagination.
If your techie and want to showcase something different to your peers, try this one. Be sure to check out the educational discount for students and post your unique applications to the forum.
Have fun with it and happy programming.