I tought this was just a SpreadFirefox stunt, but I just found the most strange User-Agent in an Apache server log
Mozilla/5.0 (X11; U; Commodore64; en-GB; rv:1.9.0.10) Gecko/20070601 C64/Commodore OS C64
*heh!* I guess it takes another Commodore fan to appreciate this kind of humor.
It is a great idea… i have to change my user agent…