If Haiku Deck doesn't seem to be able to show you any of the photos you have on your iPad or in your Photo Stream, there are probably some simple privacy settings that are keeping Haiku Deck from being able to access your pictures.
Here are the steps you'll want to follow to regain access to your pictures in Haiku Deck:
Go into to your iPad's Settings app (from your home screen)
Choose Privacy on the left
Choose Photos on the right
Find Haiku Deck in the list of apps that appears
Turn Location Services ON for Haiku Deck