So, to cut long story short, here is the deal. You sign up for the HackADay Prize, you design and build something, anything, this something has some sort of electronics connected with something else, and all these somethings in your design are open and well documented. These are the rules that you must follow, and if you win, you get a trip to space! Literally! That's the grand prize and the mother of all prizes for the geeks. More rewards of course for the not-so winners.
So, what do you wait for? Click on this link and sign up! Be creative, be innovative, be open.