A couple of weeks ago, I finally finished my own modified version of my pattern from the winter '08 Interweave Crochet. Observe:

My main modification to the pattern was to begin in an XL at the bottom (because I am pear-shaped), and then switch to a Large right before the waist. I did run into a problem, though: the shoulders were too wide. (And this after I had a conversation with one of my designer friends about that very thing!) I thought I'd mention it here just in case anyone else has the same problem, with any sweater they make.

See the shoulder on the right there, hanging off the dressform in a very unflattering way. I pinned the other shoulder up so that the seam was where it should have been, to see where I should fix it.
My first plan was to frog the cap of the sleeves and re-crochet them so that the curve was shorter. Then I reattached them, and saw that I still had the same problem. So I removed the sleeves again, and overlapped the top of the cap with the shoulder part of the main body of the sweater. I overlapped three or four stitches. (Hope that makes sense.) I pinned the sleeves on and then sewed them on while the sweater was still on the dress form, to make it easier to see. Even with that small amount of extra bulk at the edges of my shoulders, it lays much much better and I'm pleased with the fit.