I think that being able to subscribe to game developers on AG would be an excellent idea. Kind of like YouTube. Only there would be no partner program. You would get updates on what they're doing, and when they release a game you are notified.
The Armor blog has updates like that. Yeah, most big programmers have their own site. John does here as well as ConArtists. but quite honestly, most programmers have months in between updates, so it wouldn't really be worth it.
Simple, add them to your friend list. You can check a the bottom of their page in the "Submitted Games" section. Some game makers even post in their "About" any games their making. (Krin for instance) This might be a good idea, but for now there are multiple substitutes.