You have what you think is a cool idea, but you arent sure if you can convince investors about the sales potential of, say, a tiny monitor strapped to your face, or a watch that is also a computer. Besides, who are investors and how do you summon them from their secret off-shore lairs to pass judgment on your notional widget? Wouldnt it be easier if you could just put your idea on the internet, letting regular people who might be on your wavelength pledge directly to help get it done?