The diagram in this blog post is distributed under a Creative Commons (CC) license. This doesn't replace copyright – which remains undivided with Tobias Thornblad – but it makes the terms more flexible. Anyone is free to download the the diagram; share it with friends; republish or embed it on their website or blog. But this use must be made within the terms of the CC license "Attribution – NonCommercial – NonDerivative."
This Creative Commons license allows you to reproduce, distribute, display or perform publicly the diagram as long as you follow these guidelines:
Attribution: you reference explicitly Tobias Thornblad (Intangitopia) as the original source of the material.
NonCommercial: You can't use the diagram (or any parts of it) for commercial purposes.
NonDerivative: You cannot alter the diagram in any way (edit, cut, etc). These conditions can be modified only by explicit permission of the copyright holder (Tobias Thornblad). The complete text of the license can be seen here.