CLICKZ — The "huge amount of votes" that Pespi Refresh Everything participants have submitted on their cell phones will lead to a heavier mobile emphasis for that initiative next year, according to Shiv Singh, head of digital at PepsiCo. In an interview with ClickZ, Singh said the beverages company will do more geo-social marketing, while also premiering a Refresh Everything iPhone app within the next month. "One thing we are looking for as we move into 2011 is figuring out what is the best way to use Foursquare," he said. "We already have a relationship with Foursquare; we've done some different tests. But we are trying to discover how we can more strategically leverage Foursquare and maybe even Stickybits"...