It took five skeins of Patons SWS -- 70% wool, 30% soy, natural plum colorway. I enjoyed working with the yarn--it's soft and cushy, with a really nice sheen from the soy. The colors are all me--purpley pinky goodness. I can't carry off a wrap like this though, so it's destined as a Christmas gift.
Clapotis is definitely a great pattern--so much opportunity for modifications and substitutions. I have the distinct feeling that this will not be my only clapotis.