Most of the performers that I've ever known who don't suffer from SOME level or another of stage fright usually weren't very good. Some small amount (repeat -- small amount) of anxiety is healthy. It reminds you that you're not, yet, perfect. The trick to controling or overcoming stage fright is to play to your strengths. If you're not good at talking to the audience (and precious few of us really are) do as little of it as you can get away with. There is nothing wrong with letting your instrument speak for you.