CC license
I have updated the TG journey illustration to clarify the type of CC license for it.
The graph it’s under a Creative Commons Attribution 2.5 License, basically you can use it as you like as long as you remember to mention the author - that’s me =)
You can get the ‘original’ Illustrator file (CS 11.0.0) here (1.19 MB). I tried to export it to SVG, but for anything slightly more complicated than a box and a circle (non-overlapping) the SVG export function in Illustrator either fails, or create a corrupted SVG file.