I can't remember where I got this. It may have been from the newspaper. Regardless it is so simple and evryone always loves it.
8 ounces cream cheese
Salsa, as much as you want
8 ounces shredded Monterey Jack (or another good melting cheese that will stay soft - NOT mozzarella)
Spread cream cheese over bottom of a ceramic or glass baking or pie dish. Spread salsa over, then top with shredded cheese.
Bake at 350° for 15-20 minutes, till heated through and bubbly. Serve with tortilla chips.