It seems the more you look, the more you find, regarding nettles.
I was reading about how nettles can be used to treat exhausted land, to bring it back to health and productivity.
Nettles as a green manure. They also make a fantastic mulch, which feeds the soil as well as stops evaporation.
I add clover in with my nettle brew, for the garden.
Nettles in the bokashi composter are also brilliant, I put the bokashi juice on the plants, and almost have to stand back, to watch them grow. They love this stuff.
With nettles, you could practically have a self sustaining community :)