Scott McCartney covers the new IdeaWorks study of hotel loyalty program value for the Wall Street Journal.
This effort seeks to determine the rebate value that your spend has with the largest hotel loyalty programs, and estimate the value of a hotel point.
They come close to offering reasonable estimates of the value of points from IHG Rewards Club, Hilton HHonors, Starwood, and Marriott (although they slightly overvalue those points).