On Pictures on Flickr: Blog This!

There is a lovely button next to many of the pictures on flickr. It says, "Blog this." When I see the button I know that the taker of the photo wouldn't mind--in fact, would probably appreciate--my re-posting it. Despite my recent review of the subject, l still find myself with many questions about what it is OK to re-post and what isn't. With Flickr's "Blog this!" it's permission in advance with all the necessary crediting, and I like that. --gw