sketch based surfaces

Hi

I just saw an impresive tool that can make surface out of a sketch lines. Looks like a very intuitive way to quickly build forms.

Here is a video of the tool

http://www.youtube.com/watch?v=bbzQ_yXEEbE

and here is a tutorial with a link to the app

http://www.gunayorbay.com/tutorial/

It would be very nice to have a tool like this implemented in Nvil.

Thanks