Sign Language - Universal?

[RocketManJames]

Is sign language pretty much the same everywhere in the world? I don't mean to include physical gestures, such as giving someone the finger, or biting one's thumb. Those are definitely different depending on location. I am talking about the sign language that the hearing impaired or mute might use.

I know that different languages have different orderings of verbs and nouns in spoken language. Does this mean that sign language has slight variations in different locations?

-RMJ