I recently started programming in Lua too - it's a fantastic language if you want to embed it in anything, and using the LuaJIT FFI [0] makes interfacing with C code from pure Lua a pleasure. I've also started writing a set of extension libraries[1] that provide various "missing" features - mostly inspired by Ruby.

[0]: http://luajit.org/ext_ffi.html [1]: http://andrew-d.github.com/lua-ext/