The examples are there to show you what you can do from a flexible piece of software like Nginx. It could have nothing to do with the web tier.
We'll also make extensive use of AJAX, Flash, and Jemplate in this context.
To be clearer, this is not a project just for fun, but rather, a serious company project that is allowed to be opensourced.
Level 2 will be ngx_lua scripting which provides Erlang-style transparent non-blocking I/O support and access to the whole nginx infrastructure and all the level 1 scripting goodies.
Level 3 will be...well...Perl 6, JavaScript, and PHP scripting atop the ngx_lua VM (by the corresponding X -> Lua compiler). grin We'll eventually get there.