I guess I am wondering more: what sort of work would make you say "hey, I want to go work there!"
I guess I'm trying to figure this out in reverse. I know I'd leave whatever I'm doing to work for, say, Google because Google (really: I needn't say more, right?).
But what makes Google so attractive? Some of it is the bragging rights but a lot of is that they work on cool things and give you free reign to do cool things.