FYI, I have no idea if this means anything and I Know all iPad orders now have a shipping method of "priority"... but on 3/12, I asked for the 2 day shipping option which was $13 and it was just charged on my credit card...
Kinda makes me think some people are going to get this before the stores unlike the original launch. Priority seems like 3 day, your getting 2 day guaranteed. If they charged you now, why wouldn't they charge you for the Ipad? very strange.