Checking in on the Taxi Design webpage for some inspiration I saw an interview with my visual favourite Shigeo Fukuda. Just have a look on his arresting solutions...
http://images.google.se/images?um=1&hl=sv&client=firefox-a&rls=org.mozilla%3Asv-SE%3Aofficial&q=shigeo+fukuda&btnG=S%C3%B6k+bilder
http://www.illusionworks.com/mod/fukuda.htm