There are a couple limited plans for 65+ - http://www.verizonwireless.com/b2c/plan-information/?page=65Plus
You can get a smaller bucket of minutes on the individual plan (200 - the normal base minimum is 450) or a smaller allowance for a shared plan (450, normal base minimum is 900). Otherwise the pricing is the same for texting, and data add ons.
It appears there are no special discounts for Seniors, per se. The reduced minutes on the individual or shared plan would help reduce the total costs a bit.