I worked at an Apple Store from 2009-2010 as a Specialist and later as a Business Team member.
In the weeks before the launch of the iPad I was asked by the store manager to develop and deliver a series of presentations to train my store's fellow employees on the features and benefits of the iPad. I also had to answer common questions, provide training on accessories, and give AppleCare details.
The only problem is that...Apple did not provide our store with any advance information on the iPad. None. Everything I trained the store on I had to garner from Steve's presentation on the iPad and subsequent leaks on the MacRumors forums I haunted at the time.
We were not allowed to even open the cases of iPads that arrived the days before until hours before we opened the doors early on April 3, 2010.
These are photos from that morning: