I post stuff on my regular blog and keep forgetting to put it up here. Anyway, I finished the Koolhaas (pronounced kole-hahss) hat a few days ago. The yarn is Alpaca with a Twist Highlander in colorway "Skye Blue". I know others are making it or planning to make it and I have to say that I really like this pattern. Jared generally does nice work, so I'm not surprised. There is a lot of cabling involved, but the stitch pattern is still fairly easy to memorize so that I didn't have to keep looking back at the pattern after the first repeat or two.
I really strongly recommend working on cabling without a cable needle for this (Google "cabling without needle". There are several tutorials, so you can find one that works best for you). I think it'll only slow you down if you do it that way. With the two-stitch cables, it's not that difficult to slip them off the left needle and pick them back up crossed.