@Jeff Kershner - I agree with the txt solution at this point. GUMIYO is the service we used and it works good. I believe that we are still early in the game with the mobile technology and the integration of websites. Not everybody of the cell phone users has a Palm Pre, HTC Touch Pro2, iPhone etc, which allows faster download times. When mobile websites are creating a value added service and you believe as an e-Commerce Director that you don't have the clientele in your target area using this gadget will its full extend don't implement it - but when you want it, than the feature should be an option, which cost something.
I compare it almost to your customer, who just bought a car from you, you agreed to get him for free some carpet floormats - and now when the deal is done the customer wants also rubber floormats, because "it could be possible that it will rain in near future" - how is your reaction?
I remember when cars.com came in my office with the announcement that they had now Chat included as well (Hello to Ryan from CAO) and it is "free" - really? I believe that the guys from CAO are in business to make money and cars.com just not passed a "freebie" along. It is (as we all know) build in alsready in their cost structure. Same with BMW or VW with their free maintenance program - somebody has to pay for it, and it is almost always the customer - you and me.