Paying back all of the info we have received, here are some first-hand observations for those going to WWoHP at IOA:
*Wands: Hermoine's wand was sold out today, and they could not tell us when more will come in. Also sold out of Ginny Weasley (probably second choice for girls wanting Grainger's). If you want to see what Hermoine's looks like, go to the Owl Post entrance to D&B's (Dervish & Banges, not Dave & Busters), and look at the wand display. Hermoine's is in the front display, second from the right.
I was told everything from maybe tomorrow morning, to 3-5 days, to we just don't know. I saw kids crying because they ran out. Snape was sold out later in the day as well. All wands are $30. They have Voldey, Dumbley, Ron, Lupin, McGonnagle, Draco, and an assortment of astrological ones. They tell you which wand is right for you based on your birthday.
**There is a Wand Cart, that is just outside the entrance to Forbidden Journey. The line was short, they have all of the wands, and if it is available in D&B's it is available on the cart. Ride the ride, then shop for a wand.