The pattern is now available on Ravelry.com. Here are the yarn requirements:
Fingering weight yarn: MC: approx 570 m / 625 yards. CC1: approx 550 m / 600 yards. CC2 & CC3 (held double): approx 85 m / 95 yards each. This could be substituted with 45 m / 50 yards of a worsted or aran weight yarn held single.
And here are our fav yarns for this gorgeous pattern!!