As a design engineer, I have clients in more than one jurisdiction. So I find myself opening, from time to time, the 2008, 2005, 2002, and several local and state amendments.
The state is the 2008, but each city are a jurisdiction unto themselves. The ones that I work in are in the 2005 or 2002. Most jurisdictions will be in the 2008 soon.
In New York state: RCNYS and 2002 NEC for 1 and 2 family dwellings and townhouses and their associated buildings and structures. 2005 NEC for multiple dwellings and all other buildings and structures.
The state is the 2008, but each city are a jurisdiction unto themselves. The ones that I work in are in the 2005 or 2002. Most jurisdictions will be in the 2008 soon.