And here it is:
This is what it looks like before seaming. See the resemblance it holds to a tiny bath mat?
And the seaming is a piece of cake. I used the original pattern from her book, The Opinionated Knitter, which only has instructions for one size. She does point out that by using a different gauge with the same number of stitches, you can alter the size. After first starting with fingering weight yarn on size 2 needles, I quickly realized it was going to be much smaller than I was aiming for (a definite newborn/preemie size), so instead I restarted holding the yarn double and jumping up to size 4 needles, ending up with something closer to a 3-6 month size.
The yarn I used was Knit Picks Imagination in the colorway Wild West. Love it!
And since I held the yarn double, I went through my two skeins before I finished the sweater. So I finished it off with some leftover City Tweed from the hat I made baby last week.
All that's left is to find the perfect buttons.