Python on JavaScript VM's (such as V8)?

[Berco Beute]

I wonder what it would take to implement Python in JavaScript so it
can run on those fancy new JavaScript VM's such as Chrome's V8 or
Firefox' tracemonkey. Much the same as Python implementations in C#
(IronPython) and Java (Jython). It would certainly bring back the fun
in web application development. Is there anything done in that
direction?

2B