I am a really big yogurt fan and since my husband got me the La Leche League International Cookbook Set (http://store.llli.org/public/profile/317), I have been intrigued by whole foods . After reading the directions on how to make your own yogurt in their book, the thought of a way to keep the yogurt warm for a period of time made me think of my crock pot. I googled homemade yogurt in a crock pot, and sure enough there is a way. I will keep you updated on my research into this subject.
Some of the sites that have touched on this subject are http://www.nourishingdays.com/?p=912 and http://suzannemcminn.com/blog/2009/10/28/homemade-yogurt-in-a-crock-pot-and-yogurt-cheese/.
-Tanya