I go away to Vegas for a week and suddenly Wizards decides to get right with God by talking about their GSL/OGL plans! Here’s the links.
The summary is that they’ve decided not to make their GSL license terms prohibit a company from publishing *any* open games under the OGL, only any open product in the same product line as any 4e D&D product, falling firmly between the previous “by individual product” and “by entire company” theories. As an example, Paizo Publishing has an OGL line of GameMastery adventures. So theoretically, Paizo could publish 4e adventures, but under a different product line (e.g. “NewFangledAdventurez”.) This is very good news! Not great news, but good news.