Isn't this whole pinning thing crazy? I pin, pin, pin away. I have pinned from a lot of blogs not even thinking about it. Check out Laura Candler's Post if you haven't heard anything about it! Apparently when you pin something, Pinterest owns the right to the picture.
Feeeeel free to pin something from my blog, I've added the Permission to Pin button on my blog. In fact, I love seeing something from my blog pinned. It makes my little heart happy! Just be sure that your pin is a link to my blog, and not a google image or something.