Apple promotes the iPad as Father's Day Gift for 2011.
Apple started to promote the iPad as Father's Day gift in the Apple Store. Father's Day is on June 19. The iPad 2 has still a 1-2 week shipping delay. If you order it now the iPad 2 should still arrive in time for Father's Day.
Apple says about the iPad as Father's Day gift: "For everything Dad does, the gift that does everything." Isn't this nice? If you are able to afford the $499 for an entry-level iPad 2, Dad sure will be happy.
The iPad 2 is a great gift in general, but has its price. The 16GB iPad 2 Wi-Fi costs $499. The top of the line iPad 2 64GB Wi-Fi + 3G has a price of $829. More details on the Apple Store.
if your dad already owns an iPad then get him the super cool iCade iPad Arcade Cabinet from ThinkGeek.