HardwareSecrets added five new thermal compounds to their previous roundup, for a total of 20 different thermal compounds from major brands. Check it out over here.
Here is a snippet:
"Following up on our Thermal Compound Roundup - April 2011 review, we are adding five more thermal compounds to our roundup, for a total of 20 different models from Antec, Arctic Cooling, Arctic Silver, Biostar, Cooler Master, Coolink, Deepcool, Evercool, Gelid, Noctua, Prolimatech, Spire, Thermalright, Thermaltake, Tuniq, Xigmatek, and Zalman. In this review we will determine if certain products are superior to others."