Alternatives to Model View Controller?

I remember reading about an alternative pattern to the Model View Controller pattern a while ago, but I can't seem to find the reference any more.  It was a modification of MVC I believe, not the Observer pattern, it was a bit more complex than that, and not in the GOF book...   I remember reading that it was first used in some smalltalk implementations...

I was wondering, does anyone know what pattern I'm talking about?