As GP insinuated, suggesting that developers and publishers share enough interests to be represented by the same organization is... a suggestion that one is not entirely in tune with things.

It should not need pointing out that Developers, Publishers, Retailers and Consumers are all in this for vastly different reasons (with the exception of the first three all profiting from the last) and as such should not be spoken for by the same people. Unless it's Valve speaking. Publishers in particular tend to clash with everyone else over various issues (such as DRM). A brief glance back through GP's archives will throw up a number of spats between these bodies. The only unification that would be of any use would be if the various organizations of these sorts were united internationally (or in some cases, even existed internationally - are you listening ECA? There is nothing more annoying than having Facebook et all constantly remind me to join the ECA for all these awesome benefits that actually I can't get because the ECA does not exist outside America. Sorry, bit of a rant there). But before that can really happen, you have to talk about various globalization issues and I just don't feel like going there right now.