[maxsilver]

I think they are legally forbidden from doing voice by the FCC, on the ultra low band spectrum they're using. (see http://www.fcc.gov/encyclopedia/multi-use-radio-service-murs... search for "you can not make telephone calls")

If you want walkie-talkies, there's another entire band dedicated to unlicensed voice calls - http://www.fcc.gov/encyclopedia/family-radio-service-frs

You could ask them to make a dual mode device. MURS for text/sms (and greater distance), and FRS for voice and picture messages (with less distance).

[jrockway]

We're calling the "very high frequency" band the "ultra low band" now? Interesting.