Sidecook - Airbnb for personal chefs
The Rooftop - People are turning their rooftops into restaurants
NYT Cooking - iPhone app with 17,000 free recipes from The New York Times
BonAppetour - Airbnb for food with strangers
CocuSocial - Marketplace for cooking classes at hotels and restaurants
DishTango - What's for dinner? Recipes using your ingredients