Which scripting language?

I'm writing a game. It will have a full level editor, so it needs an embedded scripting language for custom events.

Guile, Lua, or Python?

What does /prog/ think of Squirrel? At a glance, it appears to be exactly what I want. Easily embedded, OO, Unicode, higher order functions, tail recursion, exceptions, generators (a big draw for a Python hacker like me).

Has anyone here tried it?