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YES! In fact, right now there's a whole group of Ham Radio operators building a mesh computer network out of point-to-point links: http://www.broadband-hamnet.org/
Also take a look at APRS, the Automatic Packet Reporting System: http://aprs.org/ It is another ham project that lets people transmit data packets (usually location); some people have linked this network to the Internet (http://aprs.fi/) and to SMS.
There are a handful of packet radio modes, if you want to get into that level of detail: https://en.wikipedia.org/wiki/Packet_radio