Ok,
regarding the contest I see two possible aims here:
- Make a contest in order to get the best possible game idea out of the community including what people have in the drawer (I can feel that many might hesitate here to contribute for different reasons)
- Make a contest which is fun to attend. This would mean, that by setting up the rules we make it very hard to come up with something already made and force people to be creative within limited time. The results might not be as good, but it might be more fun to attend.
To be honest, the first one does not seem to interesting for me at least, because probably most here have probably something lying around and would just send it in. What I want is people discussing their ideas, forming teams, competing.
What I would need for this is people who are interested to attend, people willing to be in the jury and ideas to make it a challenging task. Think of it as one of those independent video game challenges, where they develop within 48 hours or so. Depending on the resonance I will start a poll soon.