Grab five to ten minutes here or there, at the right time and the right place, to complete a massive task no one person could do on his or her own. That’s exactly what a new startup called Gigwalk is trying to do, using the power of– you guessed it– the iPhone. You download the app, enter your PayPal information and get assigned entry level “gigs” or jobs that may take just a few minutes at a time, if you’re in the right location.