How does SEOMoz create its graphics ? :)

[krishrun]

This is definitely bit off-topic though could not resist asking it...

I am in love with graphics (images) SEOmoz creates for its trainings

I would like to know what software/tool is used to create them

I am an educator myself and my students will love to learn from such engaging pictures rather boring text.

[netex72]

I bet Roger was created by Oatmeal (http://theoatmeal.com/) who used to be part of the SEOmoz team.  I imagine SEOmoz has an in-house designer that uses Adobe Illustrator to create it's icons and such.  Just guessing though.