For those who don't know: Pyjamas is a working Python port of Google Web Toolkit.

To my eyes it looks like a hidden gem of open-source world, the post is from a guy who wrote Adobe AIR-alike overnight.

Of course it's not polished, ready for everybody, but for those who know Python and like to hack it could be a base for the next killer app.

as for the guy's problem with the lack of HTML() in pygtk, there's pywebkitgtk: http://code.google.com/p/pywebkitgtk/