HardwareSecrets added five new thermal compounds to its previous roundup, for a total of 30 different thermal compounds from major brands. They also tried another "alternative" compound: toothpaste. Check it out over here.
Here is a snippet:
"Following up on our Thermal Compound Roundup - June 2011 review, we are adding five more thermal compounds to our roundup, for a total of 30 different models from Antec, Arctic Cooling, Arctic Silver, Biostar, Cooler Master, Coolink, Deepcool, Evercool, Gelid, Noctua, Prolimatech, Scythe, Shi-Etsu, Spire, Rosewill, Thermalright, Thermaltake, Titan, Tuniq, Xigmatek, and Zalman. In this review we will determine if certain products are superior to others. We will also try another "alternative" thermal compound to see if it works."