T-Mobile is offering the new iPads with cellular. Two nice perks with them. 200MB of data usage a month is free. And they will be selling the devices on a 24 month installment plan (basically a 0% interest line of credit).

http://www.macrumors.com/2013/10/23/t-mobile-offering-ipad-air-and-retina-ipad-mini-for-0-down/