Seems to have popped up on labs here: http://labs.adobe.com/wiki/index.php/Thermo

I'll reserve judgement until I can at least play with a beta but its certainly an interesting idea, particularly on the "skinning" front...forgive my apparent lack of enthusiasm, but i've not been the biggest fan of wysiwyg over my years in web design/development, there have been a lot of promises made and a lot of shoddy code generated as a result, which I've often ended up having to deal with...but thats a rant for another day ;)

I'm going to keep an open mind and wait and see...