Okay, so this news is a little old I admit. But it is very important information about your Xbox 360 experience. Or, rather, the lack of HBO Go experience you'll enjoy on your Xbox 360.
Currently, Comcast and Time Warner have not signed on to support Microsoft's attempt to partner with the smash cerebellum-stimulation module AKA HBO. See, you want it to be one way. But it's the other way.
If you have an Xbox 360 and Comcast or Time Warner, you're in the cold for now -- sorry to say. It could be a hitch based on contractual or legal agreements, something that will be resolved in coming days, but we're not for certain yet. If you hit the link, I'll give you a list of cable providers that are A-OK with HBO Go on Xbox 360. Hit it!