Recommended Links

John Miles KE5FX's Microwave Data Link for 10-Megabit Ethernet - runs 10Mbps half duplex in 10GHz band.
UPNLT UPN Laser Transceiver -- by Derek Weston. Uses laser, communicates over RS232. Australian made. :-)

DIY Wireless Networks

Guerrilla.net -- an underground aternative to the wired Internet. Boston, US.
Consume the Net is a permanent Internet connection for free over wireless licence-free radio devices. London, GB.
SFLan in San Francisco, US.
Seattle Wireless in Seattle, US.
Elektrosmog, Sweden.
BAWUG - Bay Area Wireless Users Group, US.
Wireless anarchy

DIY metallic networks

Panelak-Net - Usti Nad Labem, CZ.
Humlak (Home Net) - Mlada Boleslav, CZ

Hardware

Open Collector, where Ronja is registered. It's a site about Open Hardware. You can find there many other hardware projects that are free.
A chart of commercial optical LAN products.
Handbook of Optical Through Air Communicatios by David A. Johnson, P. E.
Rudolf's laser comm site. One guy decided to build something functionally similar to Ronja.

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