Hee, thanks everyone! I LOVE Baby Ull - it's unbelievably soft, wears decently, and goes through the delicate cycle like a champ, but it's not a lot of fun to knit for anything other than straight stockinette. It's superwash, so it's pretty slippery - dropped stitches ladder merrily (which makes it hard to do cables without a cable needle), there's no "grab" to keep strands in their proper places (meaning you have to knot new strands for intarsia and then go back and untie them before darning ends), and the loose twist means the yarn splits pretty easily. All that said, it's a very pleasant, high-quality wool in a bunch of great colors (not just insipid pastels), at a reasonable price point ($4-$6 a 180yd skein).
The intarsia is a pain, but not "hard". It's just sort of fiddly and awkward. If I made this again, I'd be tempted to swallow my knitter's pride and just do the big blocks of color with intarsia and duplicate stitch the lines - MUCH faster, and would probably result in a better-looking (better-tensioned) final product.
I estimate it took about 6 hours to knit and 4 hours to darn in the ends. I'm serious!