Open Source Free Space Optics

The resent Slashdot post about gEDA also reminded me of the Ronja project (Reasonable Optical Near Joint Access) which is what we call a free space optics wireless communications technology.

This DIY project allows for 10Mb full-duplex communication wirelessly up to 1.4km. I've always wanted to try it, but I don't have any friends in range to try it with.