After some helpful advice on flickr and the Lisette forums, I decided to try this top again. I definitely needed more space across the chest and back so I cut a larger size and added an inch to the middle front (just the bottom panel, not the yoke).
It ended up too big, like falling off my shoulders too big. I took the sleeves off and contemplated taking the yokes off, too, (yokes? is that right? it doesn't sound right) so that I could cut them to the smaller size. I didn't have the patience to do all that seam ripping though so in the end I just offset the sleeves in 1/4" in on both the front and back yokes. Most definitely not the most professional alteration but it made the neckline fit better (and the neckline still lined up . . . after two tries). I will still have to wear my "fancy" bra -- it has thin straps that wont show as easily but it also hoists my breasts up into a kind of shelf, which I find distracting. My husband doesn't mind, though :).
The fabric is this 100% linen (hence the wrinkles) from fabrics-store.com. (Again Canadians don't choose the UPS standard shipping option -- you'll end up regretting it!). It's very lightweight but not sheer so is perfect for summer.
Overall I like this style and I think I will wear this quite a bit (might have to investigate other bra options, though) but right now it feels quite baggy, almost maternity-esque. I can't see myself making this again but if I did maybe the larger size in everything except the yokes and only add 1/2" in the middle front??
Sorry for the crappy picture. My hubby only picks up my camera reluctantly so I take what I can get :)