So the most popular cameras on Flickr are Canon Rebels and iPhones (oh, and Nikons).
I can’t say I’m too surprised. On my iPhone (or any mobile phone with email) all I have to do is email my custom Flickr email address and it posts my shots right to my photostream.
It’s actually become part of the process of shooting photos with my iPhone – shoot-and-email… shoot-and-email….