IHTML: Interactive HTML.
Ahem, sounds like Zeepe 7 to me.
To make IHTML a reality, I have embedded Python and PythonCOM into Internet Explorer. That was hard, but the hard part is over and the fun part begins. Beyond replacing IHTML tags with native parts on the fly, I am playing with the idea of Persistent Page which are web pages with persistance and mutates over its lifetime: changes you make on the page are permanent. Sounds weird, but is no different from writing on your newspaper. The kicker is that these pages are smart and task-oriented. Fun stuff.
DHTML + (Active)Scripting language of your choice.
In case you are wondering, I have little interest in what W3C might say about IHTML. [Don Park's Blog]
The W3C have DOM + XHTML (==IHTML)?