This appeared in the online version of The Arizona Republic on August 2, 2006 as part of a recipe for Macayo's Green Corn Tamales with Baja Sauce:

From Macayo's Mexican Kitchen:

BAJA SAUCE

2 pounds cream cheese
8 ounces half-and-half
2 ouncees canned jalapenos, sliced
Dash of salt

Place all ingredients in blender and mix thoroughly until smooth." [I am assuming that you would also heat until warm, do not microwave - per the further instructions for tamales.]

I've been looking for this recipe for a long time myself -- enjoy!