In my mind $50/month is the max you're going to have to pay... what's the point in the extra voice minutes/etc with the N900 when you should be able to do SIP calling on the 3G network without any problems? Why pay for extra text messaging when you can use a web gateway? This is the whole point of the N900 "as a telephony device" right? Move away from the "carrier determined services" and instead rely soley on the carrier as an ISP...