I'd be interested in the Italian front as well.

I like Wolfstriked's idea, but you could turn it into a whole list of possible statuses with slight effects on the game experience:


You are warm and comfortable. - Plane is nice and responsive.
You are cold. - Controls are just a little sluggish.
You drank too much coffee! - Plane is TOO responsive.

You are getting hungry. - Map involuntarily turns on every 20 seconds or so to see if you're home yet.
You are getting sleepy. - Slight blur, slightly darken screen, slight tunnel effect
You drank too much last night. - As 'sleepy', but red instead of darkening
Can't get that song out of your head - Entire screen bounces up and down in three-quarters time.
You have to pee! - You can only face in the direction of the nearest friendly airport. Jittery screen if you're taking too long to land.

I'd buy it!