I'm not able to figure out what mapmx does. You send them an SMS and
they send you a METAR? I have GPRS with GSA so I can browse for METARs
on the web, but I'm paying 1cent per KByte over the cellualar network
so I'm looking for something low bandwidth.

(BTW: The wap.cupitt.com website does not work. It just tries to
download some application).