I've been playing with the iPad for a day now and its ridiculous how much i'm enjoying it. Anyways. Straight to the point: If there was only one iPad app to recommend to someone, which would be yours? I myself haven't purchased an paid apps yet, though the HD racing games and the XE elements app looks pretty sweet. As for the free ones i've download I'm really enjoying the NPR app. I can read interesting news stories and listen to their music at the same time. I love it. Yours?