HAML is a markup developed by ROR to generate XHTML without actually writing HTML. It’s supposed to be more “beautiful”. I’m sure it’s not insurmountable, but I have no clue about the complexity nor how many people would want to use it. A quick bit of googling only turned up Mike Henke talking about wanting to start a CF/HAML project about 2 years ago. I’m guessing nothing became of it.
There’s a sample of HAML and the HTML it produces on this Wiki page.
ColdBox Platform Evangelist
Ortus Solutions, Corp