RE: What are some good medium sized/in-between bags?
I second Lori's idea. I am still using my shower gift diaper bag because I just can't find the "right" bag. But you will probably know after the baby is born more of what you are looking for. And you probably won't go out much the first few weeks, so you could use a large tote-like purse if you had to go out.
I am still using a very basic Eddie Bauer backpack and it works OK, but does have the bottomless pit effect. I've seen people fit a LOT into the Little Tripper, so you might want to get that one because at some point it will probably fulfill a need for you (in the summer, when baby is a little older and you are carrying less bulky clothes)
Deb
Mama to my guys, K (May '03) and Q (June '07)