Here are a couple of snaps of the Scatalog from E. chromi, a spin-off of this year's Cambridge University iGEM project.
Cambridge has built a set of parts that allow generation of a rainbow of color pigments in E. coli. Designers James King and Daisy Ginsberg got creative with the application of all the hues of engineered poo as biosensors for the human GI tract. It's all nicely packaged up in a shiny briefcase, just you would see any any tech convention.
Bet that was fun coming through airport security.