I started wondering about this after reading the threads on the Kellogg's Danish Go Rounds and the folks that have written to Kellogg's asking to bring them back. I'm talking about foods that were completely discontinued and then brought back by popular demand, not something like Mother's Cookies, where the company went out of business for a while and the products were brought back by another company. And let's also exclude "limited time only" or seasonal items. There's a couple tv shows that managed to come back thanks to petitioning by fans, but I wonder how often it works with food items. Taco flavored Doritos are the only one I can think of.