I posted a paper by Carlos Zappia on how financial economics is likely to be more Keynesian kind post crisis. His take was much of financial economics and decision theory is based on Bayesian probability. Bayesian in turn does not really model uncertainty which is core problem in financial decisions. What is instead needed is a behavioral decision theory which looks at the idea of uncertainty.
Work has started already on modeling these new paradigms. However, none of this is new as Keynes meant the same in his animal spirits ideas. So it is going to resemble Keynesian ideas.
In another paper he expands the idea further.