Preheat oven to 350 degrees F.
In large bowl combine cream cheese, sour cream & ranch dressing.
Toss chicken with 1/2 cup buffalo sauce.
Mix in shredded cheddar cheese and crumbled blue cheese.
Spread into the bottom of (8 or 9-inch) deep-dish or small casserole dish.
Bake 15 minutes or until cooked through.
Serve with lightly toasted slices of baguette.