Whoa. I'm not sure where your enthusiasm is coming from. It's nice to have simple support for another language in Apache, but I don't see how this changes much in the big picture.
Lua may be nice (so I've heard, I've never actually used it) but it's not orders of magnitude better than Python, Ruby, or even PHP. You can't run Lua in the vast majority of browsers. If you want a unified language on server and client, your best bet is probably JavaScript.
<shamelessplug>I'm currently working on making the state of server side JavaScript a little better with Jack, which is like Rack/WSGI for JavaScript: http://jackjs.org </shamelessplug>
Lua may be nice (so I've heard, I've never actually used it) but it's not orders of magnitude better than Python, Ruby, or even PHP. You can't run Lua in the vast majority of browsers. If you want a unified language on server and client, your best bet is probably JavaScript.
<shamelessplug>I'm currently working on making the state of server side JavaScript a little better with Jack, which is like Rack/WSGI for JavaScript: http://jackjs.org </shamelessplug>