Lua vs PHP/Python/JSP/etc
Using Lua for web development is pretty rare...you could do it, but it will be a lot more time consuming than using a language that has matured as a web developing language (PHP) or has good web related libraries (python/ruby/etc.)  If you do go with Lua, this means you may end up "recreating the wheel" a lot for what may be easily available in mature web languages.
The better question is, what does Lua offer that you need which is not offered in the other languages you listed?  Or do you want to help Lua become a better web development platform by creating a Lua MVC framework like Rails did for Ruby?
I'm about to begin my next web development project and wanted to hear about the merits of Lua within the web-development space.
How does Lua compare to PHP/Python/JSP/etc.. for web development?
Any reason why Lua would be a poor choice for a web application language vs the others?