Hello Kee715, welcome to Revision website.
I'm sorry but the release date thats in moddb site is not possible. There's just too much work left eventhough I've released the hardest part of the mod already so the rest of the maps will be a lot easier to mod since you just pass them one time and you will never see the maps again unlike unatco hq and nyc streets. There will be one more release(before full version) which will have all the maps to NYC 08. Atleast its my goal.
As for the final release date... well it's coming next year. Maybe Q1-2 of 2009.
Very nice to see that you enjoyed Revision!