As of right now, I'm going to say as a 3G buyer who hasn't bothered to activate a data plan yet, the best reason for buying that model is for the included 8GB card.
While I don't doubt that there are future plans for the extended data service beyond constant Near updates, as of right now there really isn't much of a reason I can see for paying for another monthly data plan assuming one already has a data plan/smartphone.
But for an extra $20 over the price of a WiFi model and an 8GB card, that's nothing for a feature I'd like to have and not need than need and not have later.







