Is that yarn f/ Bluemoon Fiber Arts? Their "Socks that Rock?"
Nope. It's "Rockin's Sox" from Plymouth Yarns. They have several different shades. I picked the light-color (#044) for these to contrast with my dark brown shoes and sporran.

Question about the construction.. is the ribbing on the foot all the way around, top and bottom? or just on the top? And did you do any shaping for the calf?
All the way around, but it's P4K2 on the foot, then I switched to K4P2 for the leg. I like the feel of the knit sts on the inside of the foot, and the look of the knits on the outside of the leg.
Here's the increases on the back of the calf. I don't have very big calves, so I only had to increase 12 sts. There are 9 sts/11 rows per inch. It's a very soft, silky-feeling yarn, and doesn't grip the needles very well. The square needles help with that.



Top down? or toe up?
Toe-up. I've done both, but prefer toe-up for some reason.