Here's the scarf I've just finished, from Interweave Spring 07. It's Kathy Merrick's Boteh Scarf.
It calls for sock yarn, so I tried out some of my Trekking. The sock yarns are not always as soft as I like a scarf to be, but I'm happy with this, especially after soaking it in a Eucalan bath and blocking.
The pattern is easy to memorize, and not too hard to work. The only trouble inexperienced crocheters might have is finding the turning chains on the rows that have the double-treble crochet stitches. But, the reason I may have had a hard time is because I was working on this in the dark pit orchestra! Reading glasses turned out to be a big help.