I like this idea. What do you think about using Valve/Steam? They are in similar industries but occupy almost completely disjoint spaces. Could it be a match made in heaven?
Though, I do shudder thinking about having a company as incompetent as Sony joining forces with Valve.
Valve would be great for people who respect what they do (me included) but I'm hesitant to believe that Valve has much to gain from the partnership.
Google and Amazon are actively working towards marketing to televisions screens -- Amazon with Prime/Digital Video media sales and Google with GoogleTV and YouTube. They have more to gain from a potential partnership.
Though, I do shudder thinking about having a company as incompetent as Sony joining forces with Valve.