Everyone complains about the Xbox controllers. But here's one way to improve them a bit.

Xshok

There are a couple of ways to make Xbox more interesting. One way is to play people for money. The other is add an electroshock feature to the controllers. It almost seems like they're begging for a lawsuit, but TechTV has a guide on how to do this.
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[Gizmodo]

This would rock! I want to do this.