I think you can find healthyish options at any fast food places. My personal favorite is Chipotle. They use "real" ingredients that come from good sources, and you can build your meal to suit your needs. I get bowls there. The burrito tortillas have 300 calories so it's not worth it.
Also, Spark has made this dining out guide to help you make good choices if you have to eat fast food. www.sparkpeople.com/resource/sparkdining.a
They also have this article where Spark Staffers list their "on the go" food choices: www.sparkpeople.com/resource/nutrition_art