Rheumatoid Arthritis is an autoimmune disease, NOT your grandma’s arthritis. Below are some links that I think do a very good job of explaining this.
http://www.healthination.com/Videos/Rheumatoid-Arthritis : A 10 minute video hosted by Dr. Nancy Snyderman.
http://www.youtube.com/BuckleMeUpMovement: IAAM’s Youtube channel featuring 4 short “commercials” on what living with Rheumatoid Arthritis really looks like.