I'm surprised how many publications went the route of selling subscriptions to a virtual paper. I can't bring myself do to it. If it was just a 75 cents charge for the new articles and you could access them forever, that would be more appealing to me.
Put it this way wouldn't mind buying a national geographic on the iPad but I don't want a subscription for this very reason and it seems like a waste of money paying for something I might not get into.