Thanks! I used Martifil Stripes for that one. The one I'm currently knitting is with Caron Simply Soft that I had laying around, and that's what a lot of people on the knit-along used. I'm really liking how it's knitting up, actually. The great thing with this pattern is that you can use ANY yarn you want -- if you go with something other than worsted weight with the Craftster pattern, you will probably have to adjust the amount you cast on and the needle size you use, but after that it's smooth sailing because you try it on as you go to see when to separate the sleeves.
I've used Martifil Stripes, a cotton/ecospun yarn, Yaeger, Red Heart (which I won't use again because I hated knitting with it, but at least it's out of my stash now!), and now Caron Simply Soft, and I must say that they've turned out great with all of them. Here's a picture of the ecospun turtleneck:
I don't have pictures of the others yet.