I've been meaning to take a look at Lua
for a while now. It looks syntactically similar to Ruby, and is designed to be primarily an extension language for C/C++; but that's from a cursory examination of the manual. It's worth mentioning that there is also a Java interface
available, and the same folks who produced that have developed a web application framework to support Lua. If it really is as fast as the hype indicates, maybe it's worth looking into. Otherwise, it's probably just another mouse trap.