You were about 15 places ahead of me when they did a count of 70 online. Folks a few spots ahead of me left disappointed when the voucher people said there were no 16gb wifis left. Buying one of the less popular ones--64gb with 3G I was confident there'd be no problem arriving at 4:15.
Incidentally, a woman just behind me was reading from a Nook, so I asked, "You're getting an iPad and you have a Nook?" She said you can't do ePub drm library loans. I did a quick search on my iPhone and found Bluefire, a reader that claims to have a drm workaround. When I mentioned it she said she had tried it on her old iPad and couldn't get it to work. "Maybe you'll have better luck than me." I did and had no trouble loading up on loans from New Haven library. No Nook for me.
The majority of libraries use the Overdrive system and it supports the Nook:
http://www.overdrive.com/resources/drc/Default.aspx?type=ebook