Can a Coupon Live Inside a Cellphone?

The New York Times recently ran an interesting article about mobile coupons:

Is a coupon still a coupon if you can’t clip ’n’ save it? Betting that the answer is yes, some advertisers are beginning to invest in mobile coupons — discounts that are delivered to customers’ cellphones (with their permission), often via text messages.

Read more at the New York Times.