Congrats!!
We have two boys (almost three year old and a three week old).
As far as advice she should be starting to take a prenatal vitamin and an Omega-3 / Omega-6 fatty acid supplement. (aka fish oil) They don't taste like anything so don't freak her out, they are key for healthy brain development, plus they help lower cholesterol.
By far the most important baby item that you will actually use is the vibrating bouncing chair. $20-$40 Well worth every cent.
Start shopping around for stuff you want for the baby but buy it at Once upon a child. Kids grow out of things soo fast that most of the clothing and toys there are brand new or very lightly used for less than half the cost. Most new parents have a real problem with buying used stuff for their baby. When you start paying $9-$25 PER outfit that they fit into for three to four months you will start to get wise to the situation.
Meagan posting