Some people (especially Flickr users) may well have heard of this story already; an Australian ad campaign for Virgin Mobile Australia has been using photos (mainly CC licenced ones) from Flickr. It's causing some consternation not only because of the somewhat offensive content of some of the ads, but because the people behind the ad campaign didn't ask permission from the photographers - or perhaps more importantly, the subjects - before using the photos.
I just blogged about it if anyone's interested:
http://thoughtsfordeletion.blogspot.com/2007/07/free-culture-clash.html