Yes. It seems to have many of the same abilities as Scheme (and I forgot to mention it has coroutines.), though it doesn't have read / the sexp syntax or macros. It's extraordinarily portable, though, and also seems to also contain most of what I like about Python (though it lacks its remarkable libary).

I read The Implementation of Lua 5.0 (www.tecgraf.puc-rio.br/~lhf/ftp/doc/jucs05.pdf, 15ish page pdf) last week, experimented some with _Programming in Lua_ 2nd ed. since, and I've been very impressed with how tasteful the overall language design seems. It seems like a brilliant tiny language, much like Forth and its descendants. (I've read that the Lua source is good reading, too. See: http://www.reddit.com/comments/63hth/ask_reddit_which_oss_co...)

The Lua Emacs mode is nothing special, but I'll see if I can improve it. :)