How do you “follow” someone on Flickr? You add them as a contact.
I’ve added Sean MacEntee as a contact because I’m interested in his gadget photos.
My topic is hard to find pix for — when I review apps, I’ll be taking screen shots and using logos. So I decided to bookmark an Apple sub-set of the technology tags.
Reminder: be sure there is a CC license (or pay the licensing fee) before you use a Flickr image.