http://www.kcbt.com/ (Kansas City Board of Trade)
http://www.cbot.com/ (Chicago Board of Trade web site)
http://www.csce.com/ (New York Coffee, Sugar & Cocoa Exchange---has milk futures)
http://www.cme.com/ (Chicago Mercantile Exchange)
http://www.cbot.com/mplex/quotes/l3fut/l3dc.htm
(10 Minute Delayed Futures Quotes)