Yahoo News: Over 250 sick after eating at Indiana Olive Garden
"Some customers who ate at the Olive Garden restaurant in northeast Indianapolis between December 9 and December 13 have reported nausea, vomiting, diarrhea, and in some cases fever, said John Althardt, a spokesman for the Marion County Health Department. Three of those people have been hospitalized."

I would imagine they should look in the salads first. And I would not be surprised if they find out the lettuce came from Salinas, and not far from the industrialized dairy farm that was the source of the spinach contamination. I suppose it will take a few more outbreaks before it becomes enough of a pain in the profit margin for these large dairy farms to change some things.