I already have used these maps, and I continue drawing drafts and ideas in my notebook.
The value chain maps are evolving. In one hand you can find an open site were you can create and contribute to the creation of a tool for drawing the maps.
Update March 2018
You can find the book published by Simon Wardley here: https://medium.com/wardleymaps
On the other hand, you can access to the CSC LEF site and create your own maps.
Two different ways to draw them.
Simon Wardley has also created this table with his analysis about when the evolution of different areas will provoke a massive competence in the market. I want to keep it here to remind it in the following years.