These parallel societies could resemble "liberated zones" set up by Marxist guerrillas in parts of Latin America in the last century. But they could also exist within cities, under the very noses of the authorities - operating as secret societies with their own rules, values and enforcement.
But they could also take shape in Western countries with large Muslim minorities: The jihadis are to begin by giving areas where Muslims live a distinctly Islamic appearance, by imposing special styles of dress for women and beards for men. Then they start imposing the shariah. In the final phase, they create a parallel system of taxation and law enforcement, effectively taking the areas out of government control.
Now this is something to worry about if you live in France, Britain, Sweden, Holland, etc.
On the other hand, the Army will know exactly where to find them when it's time to clean these clowns out.
ACORN is sharia.
Besides, Habitat for humanity will help muslims who won’t take mortgages from banks.
http://doctorbulldog.wordpress.com/2008/11/05/expert-warns-obama-to-avoid-islamic-finance/
THen again, Colin Powell wants the US the welcome moslems: http://seattlepi.nwsource.com/national/384779_powell24.html
US banks are looking as that system of banking.
http://www.worldnetdaily.com/index.php?fa=PAGE.view&pageId=80003
http://michellemalkin.com/2008/01/25/banks-are-helping-sharia-make-a-back-door-entrance/
All this has been posted on FR.