We just posted a new tutorial on Instructables.com that uses our 3rd generation muscle sensors, Adafruit's Wave Shield and an Arduino to build an Iron Man repulsor that's controlled with your muscle electricity. Simply flex your forearm to charge up the repulsor (with sound effects from the movie) then relax to fire and flash the LEDs in the glove. When you turn the system on, you'll hear JARVIS talking you through the boot up sequence.
You can find the complete instructions on how to build your own here: http://www.instructables.com/id/Bionic-Iron-Man-Armor-w-Sound-Effects/
Now for the eye candy...
Let me know if you have any questions.