Some iPhone app ideas. Feel free to make use of them. If you do, an acknowledgement is all I'd ask. I'd play around with some of these ideas myself, but my PhD is what I need to focus on at the moment.
An app for a kind of verbal battle amongst friends.
I'm thinking of like the verbal battles rappers do. I'm also drawing on my own experience when I used to be bored at work I used to have a lot of email conversations with a friend that basically came down to creative ways of insulting each other.
So this'd be an app that was like a mix between real-time (textual) chat between a bunch of friends, but with some compeditive elements thrown in, to make it a bit game-like.
There'd be lots of different ways you could do this kind of thing, and getting it right would probably involve a lot of experimentation.
Here's one possibility.
The game is played in rounds. Each round lasts a set amount of time (e.g. 15 seconds). Players can type in whatever they want to say. And obviously they can make comments on what the others say.
At the end of the round, the players anonomously vote on who said the 'best' stuff.
The more 'votes' you get, the more "ammunition" you can use and you can choose who to expend it on. Players would start off with some amount of health and when they're 'fired on' they loose health. They get knocked out when their health reaches zero, and have to sit on the sidelines, so to speak.
Last person standing wins.
I can imagine the players being represented by their twitter or facebook picture, but with cartoon facial expressions and arms and legs attached to them (the facial expressions wouldn't have to be matched up with the face in the picture, or wouldn't even require a face in the picture, for the effect to work, I suspect... the idea is to do it for comic effect). Then when they're hit with some ammo, the cartoony facial expression shows an expression of pain, falls over, etc.
After thinking of this idea I came across Turntable.fm which while very different also works on the idea of adding game-like elements to more socially-oriented activities. That's a general area that could be explored.