A year ago, OMGPOP CEO Dan Porter sold the games-maker to Zynga for $180 million-plus, and became the head of the company's New York outpost. Now he’s out. Porter’s departure isn’t a huge surprise, given both his timing (presumably long enough to hit certain employment and/or earn-out goals) and the fact that Zynga ended up writing off at least half of its OMGPOP deal a few months after it closed.