Sneakers41 - I tried the milk cereal bars and they are really good, but I was recently turned on to a product called Vita Tops.
These are vitamin enriched muffin tops that have about 50% of most of the daily required vitamins which include iron and have at least 8 grams of dietary fiber.
Not only is each muffin top nutritious but they taste incredible. One Vita Top only has about 100 calories and they have them in a variety of flavors including deep chocolate chip, banana nut, and even cornbread flavors.
I think that these are a great alternative to the yogurt cereal bars and they are loading with nutritional value.
I first heard about them from a site called Hungry Girl. This site offers a lot of information on great tasting food that is nutritious and low in calories. They also offer low fat recipes and alternatives to high calorie foods.