Photo: CollectSpace
Wired has a list of some of the strangest mission patches that NASA has produced. The patch above was for the creation of the Multi-Purpose Logistics Modules of the International Space Station. NASA selected a Teenage Mutant Ninja Turtle to represent the project because three of the four modules share names with those characters. The modules were built by the Italian Space Agency, so they are named after the Italian Renaissance artists, rather than the turtles.
Link
http://www.thespacereview.com/article/1033/1
And here too:
http://www.nytimes.com/slideshow/2008/03/31/science/0401-PATCH_index.html