The Bitcoin blockchain can be kept up-to-date with less than a 2400 baud connection.  This is within the limits of amateur packet radio technology.  Using standard HAM radio transmitters and cheap SDR receivers, this can enable an unlimited number of clients to perform transaction verification and mining, possibly in remote locations, without requiring a dedicated internet connection.  A separate uplink, such as a phone line or perhaps two-way pager, can be used intermittently to initiate transactions or to transmit mined blocks.

What do you think?  Could this concept be economical in developing countries, or in areas with high internet costs?  Could it perhaps one day enable miners to reclaim stranded renewable energy during periods of overproduction?  Could it even justify dedicated satellite or unmanned aerial transmitters?  Or is this concept simply wildly-unrealistic, pie-in-the-sky speculation?