I'm afraid I agree that I've never been sent a "register" with an invite to a house warming. People often bring gifts, but generally a housewarming gift is a plant or a bottle of wine, or a small accent for your home, and I've never felt obligated to bring it. I have often offered to bring a dish.
As for the menu, it depends on what time of the day you are having the party, and how formal or casual you plan on making it. If it's a meal, I'd probably make something simple that could be made ahead and just heated and put out. Lasagna, a Salad, Garlic Bread and desert, A baked potato bar, or a summer BBQ with burgers, baked beans, potato salad, pasta salad, 3 bean salad, fruit and cookies. Or if it's evening, I'd probably do finger foods and appetizers, baby burritos, sausage balls, artichoke spinach dip with bread cubes, etc.,
at 10:38 PM on Jun. 16, 2010