I got so inspired by Andreas Nilssons graphical representation of the GNOME Release Process that I wanted to create one for Ubuntu.
The image represents the 6 months cycle, like a timeline. I've only added actual releases and left out freezes and deadlines (perhaps I'll add that later).
I started out using Andreas Nilssons .svg image as skeleton in Inkscape (which I'm just learning), but I ended up finishing it in Adobe Illustrator.
As you can see, I tried to do more of a natur theme, opposed to Andreas Nilsson. You can see his image of the GNOME release process here...