I needed to make plans for Diagramo 2.1.
I started to collect all the features I want to add when I realized that I can use Diagramo itself to make an agile plan.
As a picture make a thousand words here is what I have now:
The full link is present here http://diagramo.com/diagramo-21_YJSHgu.html
Now I can start enjoying Diagramo myself.