Web-exclusive from Interweave Knits, Summer 2005., part of the staff projects set of designs. Pattern is not in the actual magazine issue, just pictured.

From Interweave Knits:

I wanted to use an open stitch pattern for this shrug to show off the luscious color and sheen of this silk-merino yarn. I settled on a drop-stitch pattern that has an organic feel, reminding me of tree bark or even-flowing water. The way the shrug fits on the body means that the pattern appears vertical on the sleeves and horizontal across the back.To simplify the task of working increased stitches into the unsymmetrical pattern, I let the ribs become the border.