I'm excited to see that it doesn't really seem to be pooling very badly.
This is a pattern loosely based on the Undulating Rib Socks from Favorite Socks -- but completely different. I wanted some purl stitches and some knit stitches, so (even though you can't see it in the above picture, unstretched) I did a 3x1 rib then a 1x3 rib to achieve the look. I think it will work when it is actually on a foot.