I just moved to a new office space and my walls are a bit bare, if not covered in scuff marks and a few holes. I'm looking for some cool design-themed posters to inspire and spruce the place up a bit!

So far I've ordered/printed:
Periodical Table of Email
Typography Terms from FontSmith

I'm also debating printing out the cool NASA/Mars themed posters...

Suggestions? Ideas?

p.s. I want to say there was an office/desk/work environment thread started ages ago where people posted pictures, but I can't find it. It was pretty cool though and should be resurrected.