I found another photo of the 33 barrel bike

for two others that are better close ups:

http://justacarguy.blogspot.com/2010/02/variety-of-interesting-and-amusing.html

Found on http://thereifixedit.failblog.org

Kevin Chen posted about this... and got to the bottom of the concept, it was made for the 2010 Portland Soap Box Derby, and it won the best engineered. http://thekevinchen.wordpress.com/2011/02/03/rollin-on-barrels/#more-5486