Inspired by node.js, I decided to look for a standalone, Python-like JavaScript interpreter using V8 (which is faster than Python in some cases). I haven't found any solution besides one standard library project on github, which seems dead and poor man's "shell" from V8 samples.
Features I'm looking for:
Question is: have you ever heard of such JS interpreter?
You might want to look at Coffee Script. It has a nice clean syntax, compiles to JavaScript, and borrows ideas from Python and Ruby. http://jashkenas.github.com/coffee-script/