I don't photograph every meal but I do this occasionally, especially when I cook something. The weird thing is, pictures of food are compelling. One of my most popular pictures on flickr is of an avocado pizza a friend and I made in 2006. And counting advertising, you probably see about ten to twenty meals depicted in the course of a typical day.

There's an opportunity here, someone could make the hotornot / chatroulette of food photography and done right it would be a monster hit.