In the wake of the financial crisis, the United States is no longer the leader of the global economy, and no other nation has the political and economic leverage to replace it. Rather than a forum for compromise, the G-20 is likely to be an arena of conflict.
Seems to me there are a couple of interrelated ways to approach the governance revolution: (1) challenges to individual states (including discussion of failed states) and to the state as the primary actor on the world stage, and (2) changes and challenges in global governance (e.g., rise of the BRICs, or maybe BICs now that Russia seems to be under-performing).
We have done some work with the Korbel School at Denver, and they have a simulation/modeling platform called IFs that allows you to test out some of the same assumptions we have in Seven Revolutions. I suggest you check it out.
This is a really interesting series of projects that have a lot of overlap with seven revolutions. Lots of neat interactive presentations, images, and video.