Cook linguine according to package directions. Meanwhile, in a large skillet, cook bacon over medium heat until crisp. Using a slotted spoon, remove to paper towels; drain, reserving 1 tablespoon drippings.
In the drippings, saute spinach and onion until spinach is wilted and onion is tender. Add garlic; cook 1 minute longer. Add the milk, cream cheese, butter, salt, nutmeg and pepper; stir until smooth. Stir in pine nuts and bacon; heat through. Drain pasta; toss with sauce.