If you've got a small space to garden in or a bad back check out these links:
http://www.squarefootgardening.com/
http://journeytoforever.org/garden_sqft.html
http://forums.gardenweb.com/forums/sqfoot/
http://www.mnsi.net/~jhlavac/gardening/squarefoot.htm
http://www.farmerbrown.org/sqft.html
http://timssquarefootgarden.com/
http://www.squarefootgardening.co.uk/
http://www.squarefootgardening.com/
http://journeytoforever.org/garden_sqft.html
http://forums.gardenweb.com/forums/sqfoot/
http://www.mnsi.net/~jhlavac/gardening/squarefoot.htm
http://www.farmerbrown.org/sqft.html
http://timssquarefootgarden.com/
http://www.squarefootgardening.co.uk/