mhm, but those are GPS receivers only. SFE sells the 'ubertracker' for $325 which is GPS + GSM. You could also whack together a super-cheap prepaid phone ala

mhm, but those are GPS receivers only. SFE sells the 'ubertracker' for $325 which is GPS + GSM. You could also whack together a super-cheap prepaid phone ala http://instamapper.com http://instamapper.com