Preheat oven to 425 degrees. Spray a 9 inch baking dish with nonstick spray.
In your mixing bowl, combine cream cheese, mayo and sour cream.
Add the artichoke hearts, crab, 1/2 the fontina cheese, pepper jack cheese, green onions, Worcestershire, salt and pepper; blend until all combined.
Spread in the prepared pan and sprinkle with remaining cheese; bake 20-25 minutes until hot and bubbly.
Serve immediately with your favorite crackers or crostini.