Oh, sure -- this has certainly been tried before, but given that things like this need a critical mass of followers to be effective, we're particularly jazzed about Google's own initiative. Dubbed 'Open Spot,' this bloody brilliant Android (2.0 and up) application enables motorists to search for unclaimed spaces that have been reported by other Open Spot users, and once they head elsewhere, it allows them to mark their spot as open and available. Once a spot is marked, the color gradually fades from red to yellow the longer it remains unclaimed. We've given it a quick