As location-based services have emerged as a compelling place for businesses to interact with potential customers, there have been a flux of marketing and social media platforms that help set up campaigns. Context Optional, SnackSquare, Geotoko, Sprout Social and a number of other platforms are helping brands run campaigns on services like Foursquare, Twitter, Gowalla and now Facebook Places. PlacePunch is launching its platform in the space, and has already enlisted a well-known brand as a client. PlacePunch, which received seed funding from Shotput Ventures, allows businesses both big and small to run their own location-based marketing campaigns that integrate with Foursquare, Facebook Places, Twitter, Gowalla and other location-based social networks.