"I have a great idea for an iPhone app. You'd develop it and we'll go 50/50"
<cue communal groans>
<cue communal groans>
I've come across my fair share of freeloaders.
What gets me is that they never ever see it like "you do the work for nothing, you take all the risk, and I reap half of everything you earn, and if you don't make a fortune I want everything you have".