Lush cardigan by Tin Can Knits using wool bought from a charity shop. I picked the pattern using the Ravelry pattern browser, and looking through the finished versions I saw the cardigan made for Roobeedoo, which I had admired when she blogged about it. You start by knitting the long lace section, and it is really enjoyable to knit. I just finished and blocked that, and picked up stitches along the top edge to knit the collar. Lace knitting can be a bit daunting, but there are only 23 stitches in the repeat, so you can't go too far wrong.
It is pure wool but claims to be 'moth resistant' - I'm not sure how. Treatment with some kind of chemical perhaps?