One thing I just remembered today about one year warranty. One year is defined as 365 days. So if you bought an iPad 2 on March 11th, 2011 the one year warranty expires on March 9th, 2012.
Luckily AppleCare Customer Service Representative is so nice to help me register the AppleCare agreement that I purchased months ago. I just forgot to register it or even to keep the receipt.
Thanks AppleCare.