PopCap's addictive Plants vs. Zombies mixed adorable songs and tower defense elements to become a casual game sensation but has kept relatively quiet since its May 2009 release. Today, PopCap delivered an image of a zombified hand coming out of the ground asking us to "save the date" of August 2, 2010. Initialspeculation is PopCap is poised to announce a sequel to the popular casual title; however, we'd be just as happy to get another catchy tune.