I have seen peanuts seasonal fabric at JoAnns for a couple of years.
I also found some in a google search:
http://www.funfabrics.com/alphafabric.htm
http://www.fatquartershop.com/Peanut...-Treasures.asp
(this line comes out in early 2010)
http://collectpeanuts.com/wp/craft-supplies/fabric/