On one of the website notification services to which I subscribe, I found this little gem: Nutrient Data Laboratory: The Agricultural Research Service of the U.S. Department of Agriculture provides detailed information about the nutritional values of more than a thousand foods here. Users may search by individual food, including many brand-name products, or by nutrient, e.g. calcium, fiber, and fat.
The Globe and Mail published an article two days ago about junk food that had frightening statistics on calories and fat content in things like Big Macs (590 cal, 34 gr fat), Tim Hortons chocolate dip donut (233 cal, 10 gr fat - can you ever eat just one!), Taco Bell Mucho Grande Nachos (1,320 cal, 82 gr fat). The only good news: Subway's Veggie Delite, 6 inch sandwich: 200 cal, 2 gr fat.