My mate Rob sent me this and it seems pretty cool!
http://www.guardian.co.uk/society/2010/aug/17/communities-swap-seeds-save-plants
For some reason journalists think seed saving and seed swapping is revolutionary...
http://theseedsite.co.uk/
If you are collecting seeds right now or have been given some but can't remember what they are this site is just what you need! It has photos of 700 plant seeds and seedlings - amazing. And not only that, it also has helpful botanical info as well.
http://www.cat.org.uk/
The Centre of Alternative Technology has lots of information about land use, energy use, recylcing and low impact gardening.
http://www.gardenorganic.org.uk/
Garden Organic are the original organic gardening group who set up when it wasn't really that fashionable to shun chemicals. They have an amazing garden at Ryton, which is on my 'to visit' list!
http://www.realseeds.co.uk/
http://www.seedysunday.org/
http://www.guerrillagardening.org/
http://www.primalseeds.org/guerrilla.htm
