I took Diana Sullivan's advice and tried a full needle rib tuck. Isn't this pretty? I used her example from Stitchworld. Easy enough to enter into the machine. Didn't check to see if it was in my Stitchworld III book because it only took a minute to enter the 8 stitch 7 row pattern. Here it is on Diana's blog:
http://diananatters.blogspot.com/2010/04/tucked-ribbing-ideas.html
This is some thread-thin mill end stuff, probably acrylic. But it's really soft when knit up and thread-thin worked fine for this scarf. It has a dressy look to it and is as light as a feather. What I like is that both sides look really similar.
Here are directions in case you want to make a similar one. I cast on 40 stitches in full needle rib at T 0/0. Did the circular cast on, knit 10 rows at T 1/1. Then I transferred stitches according to Diana's pattern, putting every 4th needle out of work on the main bed. (Those are the stitches that were transferred to the ribber.) Then I did my KC row to select needles, turned on the electronics, pushed in my tuck buttons and knit 500 rows. At the end, I switched back to fnr (every needle in work both beds by borrowing purl bumps to fill in), T 1/1 knit 10 rows, one row T 7/7. Transferred rib stitches to main bed and chained off. It dawned on me after all was said and done that I didn't engage the tuck brushes. Didn't seem to matter since I weighted it well and moved the weights up every 80 rows or so.
I think I'll make some charity shawls with this pattern. I certainly have enough yarn for several and I think they'd make a nice cover-up in air conditioning in the summer. Thanks, Diana!