With vanilla yogurt you have to be a bit careful. In general, it'll be much better in sweet dishes -- e.g., modkitten's smoothies -- than in savory dishes. Most savory recipes that call for yogurt mean plain yogurt, which is a very different beastie.
FWIW, flavored yogurts, except those made with aspartame, have a lot of empty carbs in them from sugar or corn syrup. The "fruit" stuff at the bottom is basically jam. Use it in diets accordingly.