Spitzer opened up the mid-infrared window for surveys to find large numbers of dust obscured quasars. In this talk I will present the results of our recently completed spectroscopic follow-up campaigns on samples of dusty quasar candidates selected in the mid-infrared, which show that not only are there large numbers of these objects, but that they may significantly outnumber the normal quasar population at the highest redshifts. I will also present the preliminary results of an EVLA OSRO search for CO 1-0 in some of these objects at z~2-3.