Old thread here, but I just found out about Sprint Relay (sprintrelay.com), which offers unlimited data for $30/month, with pricey per minute voice cost. It's supposedly 3G. Is it feasible to tether a NIT to a phone on this plan and use DialCentral with Google Voice? I'm not much of a voice user, but I wouldn't want to be stuck with _no_ voice whatsoever, and if DialCentral is actually usable on this setup it's totally worth it to be connected everywhere.