[javery]

Just from reading through it quickly it includes the following things I believe are absent in all of the above (although I have only worked with ASP.NET MVC and MonoRail).

1) It has a built in web-server. This is hugely awesome, especially since it is based on Tornado. No mucking with Apache or Nginx, CGI, etc.

2) It includes command line app generation and compilation - missing from at least ASP.NET MVC.

3) Simple Routing - did you look at the route and lamba? That is awesome.

Some of what is here is similar to what exists, but this looks much improved. Pipes looks to be an improvement over the current HttpModules of ASP.NET. The view engine looks like an improvement over .aspx. The HTML5 template looks like an improvement over the crappy templates that MVC creates.

[city41]

What happens if Tornado doesn't meet your needs? How easy is it to move this framework onto something else?

[javery]

To be clear it isn't Tornado, it's a custom server inspired by Tornado. It sounds like the framework is fairly tied to the implementation of the server (most likely where routing, pipes, etc are all hooked up)