Thank you for mentioning this - it was not on my RADAR - now noted, and perhaps I'll create a node in my area (not much "need" as there is very little lighting - we're blessed).
In a somewhat similar (Geeky) vein, here's a similar project for Amateur Radio Operators called WSPRnet
http://wsprnet.org/drupal/wsprnet/map
Weak Signal Propagation Reporter (WSPR) is a mode that allows very, very low power transmitters (can be as simple as piece of wire coming off a GPIO pin on a Raspberry Pi) to be heard around the world via this network of receivers. Radio is amazing.
Radio is amazing.
Yes. Definitely.
On my (much too long) list of useless projects there is a VLF receiver. I would like to see the Schumann resonances in data I acquired myself. Nothing is more convincing to a physics major :-)