Biketour owns two Bob-trailers (there are some rumors [in the list and on this wiki] that the biketour had a kid's trailer as well)
One trailer is in marishiweu squat, in barcelona - was picked up on march/2012 from torino
Two new standard quick release axles arrived (March/2012) at Research and Degrowth office.
There were some polemics about trailer design on the list (Feb/2012), this webpage points all the pro and cons of different trailer designs: http://www.carryfreedom.com/info.html
we have two trailers of the old version of Yak: http://www.bobgear.com/yak