(click on image to enlarge)
Today, March 30, 2011 USDA published its "Agricultural Prices" report: http://usda.mannlib.cornell.edu/usda/current/AgriPric/AgriPric-03-30-2011.pdf
Above is the all milk price for most states. Note, there appears to be quite a spread in butter fat test. California is mostly giving milk away. Note also, the hay prices on page 23. these seem to be lower than many reports but, California is not getting free hay.
On page 30 note, the "All Milk Price" for March 2011 is 46% of parity. Some say dairy farmers have received a signal to produce more milk, the signal never goes away.