While our neighborhoods are not like that, that same relationship exists in our churches. Rather then being organized by location generally we are organized by beliefs.
When we had our car accident the Relief Society sisters brought lots of food for use and the Elders helped us get around.
Lately one of the families in our ward was overwhelmed by the generosity of everyone, their frig and freezers were totally filled, and they are eating dinner for breakfast and lunch too.
In the aftermath of Hurricane Katrina, I am looking at doing more with my immediate neighbors. With some emergency Preparation information. They are closest to us and we do need to include them in our disaster plans.