I did. As Crystal says, there are two types - "Baby sign" is mostly made up motions that can be easier for a baby to do. "ASL" is the official sign language. With either, the baby probably won't do the sign "correctly". That's just fine. He won't say his first words correctly either (not for years!) and you'll still understand him.
I used the "My Baby Can Talk" video series. They were very easy for me to learn from and they kept my daughter's attention fairly well. She is 27 months now and still likes to watch them sometimes and uses the signs when she needs an extra boost to make herself understood.
at 1:44 PM on Nov. 18, 2008