It's interesting to see that the Microsoft Xinput API that the Xbox 360 controller uses in Windows has a customizable deadzone, all the way to 0/unfiltered as I understand it. Anton mentions this API in a different thread, but I don't know if this is actually used when programming for the Xbox 360 directly.
If anyone can find out more about what protocol/API is being used on the 360, I'd be interested to see what documentation is available for this. I'm sure that there is some channel for developer communication that would be appropriate in a situation such as this.
Here's a link to Microsoft's Xinput documentation, BTW:
http://msdn.microsoft.com/en-us/libr...what_is_xinput