Due to topographical issues, there is no CDMA coverage at my home but
GSM works.  So I'm thinking of switching.  I'd be getting a Treo, which
T-Mobile no longer carries.

Part of the service I want is minimal data usage.  I'm not tethering it
to a laptop, nor will I be spending oodles of time and bandwidth
downloading stuff.  For data usage, I'd be using it mainly to
occasionally look up a phone number, address or driving directions,
movie listings, weather reports, stuff like that.  With my VZW plan, I
can do this and simply use my normal plan minutes.  This suits me
perfectly... except for the lack of coverage at home.

Cingular apparently does not allow that.

For my minimal data usage, would one of the "MEdia" data plans work, or
would I be forced to spend $20/month more for something I may only use
a few times a month?