Looks like the Japan situation is going to affect iPad shortages:
http://www.appleinsider.com/articles/11/03/17/shortages_of_apples_ipad_and_iphone_to_bleed_into_june_quarter_following_japan_tsunami.html
http://www.appleinsider.com/articles/11/03/17/shortages_of_apples_ipad_and_iphone_to_bleed_into_june_quarter_following_japan_tsunami.html