Thanks.
I did searched it from the BMW web and found this link:
http://www.bmwusa.com/owners/bmwassist/convenience saying traffic info is part of convenience plan that requires an annual fee. Then I called our good friends at BMW-NA and told me the same thing.
I figured it's free since I'm not paying for it. That's all that matters.
This stuff works great specially in the L.A. freeway parking lots.