Tip - Border for granny square afghans

I'm very busy "behind the scenes" right now. I have a lot of reading, writing, editing, etc while trying to get our spring weekend crochet event up and running. I can't write very much here about that, and it would be rather boring to the average reader, so I'm looking for fun things to share.

"Here" is a great blog entry about adding borders to granny square afghans and a tip to make the border smooth. I think that it's a great tip.
While there, look closely at the lovely yarn she's using in this afghan. The colors are lovely, the yarn is smooth and has a little sheen. In the close up photo, you can see each strand in the plied yarn, which makes me think that it might be Microspun.