Bought these Jiffy Greenhouses at a big box home improvement store (which I work at). I figured since I was going to do it anyways I might as well take some pictures and throw together an Instructable.
also makes peat pellets along with a couple other off brand. Jiffy and Ferry-Morse are the major brands that I have seen. Here is one I found on amazon
, its about a dollar cheaper (before shipping) than the one i purchased at the big box home improvement store.