I have a couple of questions about the "weird sig" idea:
Do uncommon divisions of a common time signature count? Constantly switching time signatures, common and/or uncommon? Would the goal be to make the time signature sound natural or intentionally jarring?
That would be something to be discussed amongst the judges before the scoring system is developed. I'd say it could be swung any way you're wanting, since the contests typically have a big degree of freedom. To me, personally, I would count both of those situations. As far as the last question goes, I can't say one way or another... but it's a good question!
EDIT: Also, for the record, ninja'd x2 X'D