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http://www.downes.ca/cgi-bin/page.cgi?type=link&post=61478&format=html

flickr photo by ** RCB ** http://flickr.com/photos/29233640@N07/3645211083 shared under a Creative Commons (BY) license@acroom

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flickr photo by JR_Paris http://flickr.com/photos/jrparis/106493273 shared under a Creative Commons (BY-NC-ND) license@acroom

flickr photo by quantumlars http://flickr.com/photos/lars_in_japan/6129526077 shared under a Creative Commons (BY-NC-SA) license@acroom

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flickr photo by snakepliskens http://flickr.com/photos/jimgroom/14542773160 shared under a Creative Commons (BY-NC-SA) license@acroom

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flickr photo by cogdogblog http://flickr.com/photos/cogdog/10295189744 shared under a Creative Commons (BY-SA) license@acroom

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flickr photo by mr-numb http://flickr.com/photos/mr-numb/15459745406 shared under a Creative Commons (BY-NC-ND) license@acroom

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flickr photo by mikecogh http://flickr.com/photos/mikecogh/8659531891 shared under a Creative Commons (BY-SA) license@acroom

Adam CroomUniversity of Oklahoma@acroom