The Xbox 360 is adding another round to its bullet list of features. HBO Go, HBO’s streaming video service, is expected to be up and running on April 1. Should we read anything into the timing? Probably not. Of course, you could say the fact that you’ll need a cable TV subscription (and a provider that plays nice), HBO subscription, and Xbox Live gold subscription is a prank in and of itself. HBO co-president Eric Kessler says the app will allow users to access movies, special features and every episode of nearly every HBO series.