This sounds like something we already have. I don't want this to sound confrontational, since I know the F-word is viewed as kind of "dirty" around here, but how is what you're proposing substantially different from Flash?
Well for starters its open source instead of proprietary. I think that already deserves some respect on its own.
Then, this is based on doing websites in the web standards spirit of using plain-text files, where multiple components are linked together, and having the semantic content (XML) separated from the presentation (HSS).
I mean, we like the concept of HTML+CSS, but we would like to see many of its flaws and shortcomings corrected.
