@azade - I put on a lot of width in the ribs, too. I used to fit a 32 bra band, now i'm in 38s! It's not like I'm carrying any extra fat around the ribcage, that's still pretty trim... Experienced mamas want to chime in and tell me if that's going to go back to normal, or should I give up on any of my old clothes fitting there again?
with dd1 I went from a 34 to a 40 (!!) during pregnancy - eventually I went back down to a 36 post partum (by the time I got pregnant again). I didn't expand this time very much - now I wear between 36-38 though my cup size went up a lot. Of course it all depends on what bras you buy - I seem to very a lot between brands on both cup and band.