Some links on "natural" claims:
Kraft Florida lawsuit information re: Capri Sun "natural" claim
http://www.cspinet.org/new/200701081.html
http://cspinet.org/new/pdf/complaint.pdf
Wikipedia article (High Fructose Corn Syrup):
http://en.wikipedia.org/wiki/High_fructose_corn_syrup
USDA Public Meeting Notice - Product Labeling: Definition of the term "Natural" (Dec. 12, 2006):
http://www.fsis.usda.gov/OPPDE/rdad/FRPubs/2006-0040.pdf
USDA/FSIS Public Meeting on the Definition of the term "Natural" summary information:
http://www.americanbakers.org/documents/FSIS_Natural.pdf