HardwareSecrets tested five more thermal pastes, you can check out the results over here. They also tested mayonnaise this time and the results of this sauce are quite surprising, it's unknown how it will perform over the long run but during the tests it performed better than a lot of high-end thermal pastes!
We added five new thermal compounds to our previous roundup, for a total of 45 different thermal compounds from major brands. We also tried another "alternative" compound: mayonnaise.
Here is a snippet:
"Following up on our Thermal Compound Roundup - September 2011 review, we are adding five more thermal compounds to our roundup, for a total of 45 different models from Akasa, Antec, Arctic Cooling, Arctic Silver, Biostar, Cooler Master, Coolink, Deepcool, Dow Corning, Enermax, Evercool, Gelid, Glacialstars, Masscool, Nexus, Noctua, Prolimatech, Scythe, Shin-Etsu, Spire, Rosewill, Thermalright, Thermaltake, TIM Consultants, Titan, Tuniq, Xigmatek, Zalman, and ZEROtherm. 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."