Resources

Books
The Edible Mushroom Book
Food for Free
Growing Gourmet and Medicinal Mushrooms by Paul Stamets

The Full English Cassoulet: Making Do In The Kitchen by Richard Mabey (Hardcover - 2 Oct 2008)

Articles
Richard Mabey article in The Guardian: "My own top 10, for a combination of taste and ease of recognition, would be: parasol, giant puffball, cep, oyster mushroom, chicken-of-the-woods, field mushroom, shaggy inkcap, blewit, morel and wood hedgehog." (With pictures.)

Another foraging article from The Guardian: Foraging without fear. And some pictures.

And another from 2010.

Websites
Roger's Mushroom identifier
Wild Man Wild Food (lots on here)
Wild Food Essex
Mushroom Foraging GuideTie Dyed Freaks
Wild Mushrooms Online
Sussex Fungi Group
Field Mycology and Conservation
Fungi of Sussex
The Association of British Fungus GroupsMajor Mushroom Groups
Champ Yves (en français)
Royal Horticultural Society
Mycologue
Shroomery
iSpot - not just for mushrooms
http://fungus.org.uk/

Flickr sets
http://www.flickr.com/photos/gorpie/sets/72157594464685616

Video tutorials
Grow mushrooms

Kits
Grow your own on logs
Grow oyster mushrooms
Ragman's mushroom logs
Gourmet mushrooms
Grow Morels from spawn
Mycomasters

Misc
Gill classification