The logo for Bike Salute .com is on that sign.
Here are similar photos that I’ve come across -
I’ve posted that last one here already.
The photographer — Grant Neufeld — has posted more bike lift photos here -
“70,000 wheels in the air: Bikelifting after the Hungarian Critical Mass, Budapest, September 22, 2007.”
(From the Wikipedia critical mass page) -
This image may be from the same “critical mass” bike rally -
I don’t know how I came across that photo, and I haven’t managed to find any text about it. Something gave me the impression that the image may have been in a September, 2007 issue of Time magazine, but I’m not sure.