Ok... so where I grew up was not exactly what I would call  urban by any means  but it was most definitely an incorporated town  and I lived within the confines of that town. Towns in 1975 were a little different than towns or cities we see today in that if there were ordinances on such things like having  gardens and/or critters and selling that produce or critters, they were not enforced and we were pretty much able to do as we pleased.
We had chickens, goats, rabbits, horses, pigs, cows and even  sheep  on occasion. We  had a big old garden too. From those gardens and from those critters on our little   homestead we ate  well and sold some of our produce and products from the critters. My mother sewed all of our clothes and made all of our food from scratch. Sound familiar?
 Ummmmmmm...   Did I mention that this was in the early 1970's and not 2009 or 2011.
 Though we did not call it anything in particular other than  "the funny farm," it indeed was  urban homesteading and without it I would not be who and what I am today. I would not be growing 90% of our food. I would likely  not be walking lightly upon the Earth and  leaving as small of a footprint  behind me  as I can. I would  likely  not grind my grains, make my noodles, slaughter my chickens  or  make my own clothes.  If I had not grown up where I did and how I did,my children would also not know these things, but they do !!!
You see this is a lifestyle and it is not new. It has been  occurring since the dawn of time. People have been growing  food on their little plots of land, attempting to preserve their way of life by teaching others, protecting the Earth and  walking softly while upon it and even "inventing" "new,"  improved ways of doing it  for thousands and thousands of years. It is not something  anyone can trademark or patent as it not an idea but a verb, an action, not a possession.
The very idea that someone has  tried to and has succeeded  sickens me to the very core.  Another case of  "the vision got lost" along the way or perhaps people only saw what they wanted to see and made idols out of things that should not be idolized.  No matter, it seems  the nose has been chopped to spite the face and now things  will play out as they need to. Fortunately,  homesteaders of all sorts are being brought together by the mess that has been created  and  we are standing up together for that which we believe in.   Kings are losing their crowns all over these days!!