My hourglass sweater is complete:
The finished sweater is in-between the two smallest sizes. Originally, I planned to modfiy the pattern to create a new size, but when I got 18sts/in gauge, it wasn't necessary. I just followed the instructions for the smallest size (following length instructions for the medium) and it worked out fine.
Some people mentioned the sleeves being too long. I knit mine to 20" instead of 18.5", and they'd be fine longer too! (must have super-long arms...)
I looooove this sweater. The simple styling is perfect. Its a great introduction to working a sweater in the round. My yarn is 100% wool, so it pretty much has to be layered over another shirt. I bet its great in the cash iroha!
More details at my blog.