It looks like he might get an NGDP futures market going. This is great news. I agree with him that the Fed should already be managing something like this, even if they aren't targeting NGDP, simply as a forecasting tool. Not only is the Fed not doing this, but it is illegal for Americans to take part. (Yes, that is insane. Paul Rhode - via Robin Hanson - explains, in a way, why the Fed isn't doing it and why you can't do it, here.)
We should all wish him the best. It sounds like it is going well so far.
Here is more from Sumner on the sorry state of US financial repression.