Buy a select iPad with 24-mo. installments and choose the 3GB data plan. You'll save $22.09/mo. for 24 months. Must have active handset on account. Savings via monthly service credit; credit applied to invoice within 3 billing cycles.
IMHO, the deal is not too bad if you were looking for a new iPad anyway. Total cost is as little as $840 for the tablet and 24 months of 3GB data.