The Food Assistance Landscape, recently released by the USDA, covers recent trends from the Food and Nutrition Service. It reports that the 11% increase in expenditures for food assistance programs in fiscal year 2008 was the largest percentage increase in 16 years. While SNAP accounts for 62% of spending, WIC was the fastest growing food assistance program in 2008.
http://www.ers.usda.gov/Publications/EIB6-6/