Based on howard forums it's not really unlimited data. 1000MB and then they shut you off.
Depends on how many minutes you use. $50 on T-Mo get you 500min +text +web ($10 version). I don't text much, so my bill is usually under $50 w/ taxes (500+web).
__________________
*Consumer*, not a developer! I apologize for any inconvenience. My script to backup /home and /opt
Samsung Galaxy S Vibrant, Huawei S7, N900(retired), N800(retired)
Anybody? I think I just might give it a whirl as I am month to month on t-mobile...