List of potential things which we could do maybe and improve on

Microphone/ audio input to Flash:
basically, yelling or talking etc directly affects the flash animation. Ideas for the animation itself were as folloze....

The boats on water, level of audio input via mic (yelling basically) distorts waves with boats on them in an interactive flash animation sort of thingy.

The hot air-balloon, rises and falls to avoid objects, the gas for the balloon is released relative to the level of input via mic.

Slot car racing, the accelleration pedal/trigger is controlled by the audio input via mic, again :P one of the benefits for this one is that it still has an interface but is not as screen based as others.

Virtual arguments, probably not operated by speech-recognition, depending on what technology we can get out hands on and work, but where low volume input is comforting to the digital person and loud volume input is threatening. To elaborate, the character always starts in disagreement with something which you must try to convince them on. Depending on their 'personality' and 'mood' different volumes have results to varying effects, when their personality is assertive and their mood is angry, if you were to raise your voice at them then it would provoke an argumentative and negative response. This is in contrast to if they were mellow in personality and in an upset mood (the other extreme), if you were to raise your voice at them then they would more likely be coerced into agreement rather than provoking a negative reaction. (this idea could be fairly cheesy to play and weird without actual speech coming into it, as well as basically virtual manipulation, which doesn't really seem like a good basis for a game :P)

Drinking game, where a consistent level of volume over 80 decibels (or whatever) fills a pint with beer (probably on screen) which the other player must then drink in equal amount. Winner could be decided by who achieved the most bac on their opponents, measured by a breath testing contraption. (random thought, to minimise the 'screen factor' could we actually attach the audio input to directly control a keg or something, also LOL!! )

The interpretation of the 'penis' game, the players are ranked by maximum decibels achieved in a public place (train, tram, shopping centre etc but obviously not somewhere that the environmental noise affects player score) Loop-holes/issues are mainly just that people could easily cheat by holding the mic closer to their mouth which would make their noises seem louder without actually being louder.

Other general ideas:

Game of balance, based on the cowd-surfing idea but made more possible for everyday life situations, eg. on the train/tram, rollercoaster? Basically, an iPhone application which measures how level the phone is kept. The steadier you keep it, the more you win :P

Sewing game, based on the habit many people have, where they move their leg up and down in small, quick movements when bored or tense. Speed of movements defines speed of sewing rate, and general 'you are awesome at this game-ness'. Perhaps done by having iPhone or Wii-mote sensetive to movements from which it calculates information, and yay and so forth!!