I love using it too. They have an awesome iPad app, and I love going through my feed and flipping through blog posts, it gives it the feel of a magazine.
It has been a long time since I offered a freebie button for the blog. So here's a good one, I have a square, circle or rectangle option for you in a classic black and white that will complement any blog design.
Check out mine in the sidebar
Let us know if you use them, and feel free to post the link to your blog below!