It’s starting to happen. I was talking to someone just the other night about how such deals would greatly benefit mainstream media outlets. The price of the readers is falling very rapidly while their capabilities just keep growing.Well, this was bound to happen. Barnes & Noble is offering big discounts on its Nook e-readers to people taking out subscriptions to digital editions of magazines and newspapers:The Nook edition of People is $9.99 a month; with a one-year subscription, customers will receive a Nook Tablet, a color device with a 7-inch display, for $199, a discount from its regular price of $249. Customers who buy a one-year subscription for the Nook edition of The New York Times for $19.99 a month, which in…