I made a lot of predictions about the Econ Nobel (noticed Williamson and said environmental, which Ostrom is, at least partly). However, one I made was that once again the prediction markets for the Econ Nobel would fail, and they have, spectacularly.
Ladbroke's had Fama as top at 2 to 1, followed by Paul Romer at 4 to 1, and Fehr, French, and Barro at 6 to 1. Williamson and Ostrom were both far down the list at 50 to 1.
The Harvard betting pool had as their tops in order: Jean Tirole, John Taylor, Paul Milgrom, and Martin Weitzman (who I said was likely, and was also in the top ten at Ladbroke's, as was Tirole).
Thomson Reuters had their tops as Ernst Fehr, Matthew Rabin (also in top ten of Ladbroke's) and William Nordhaus, also sort of on my list.
others mentioned in a Real Time Economics post included Christopher Sims, Richard Thaler, Oliver Hart, Halbert White, Thomas Sargent, Lars Hansen, and Peter Diamond. Neither of the actual winners anywhere in sight.