We pre-ordered our Playbooks through Staples to make sure we got units on the 19th, which we did, but...just fyi...
We drove to the store where we had them delivered on the morning of the 19th, and they said they "weren't in yet". They did have plenty in-stock for physical store purchasers, however. They wouldn't give us the units from stock, we had to wait for our online orders to arrive. So we did end up getting product by the end of the day on the 19th, but would have got them faster if we didn't pre-order and just showed up at the store.
Go figure. Ah well, gives me a nice ecommerce story to tell in my marketing classes
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