You've got me beat by about a year. I started listening to Rush in 1989 when I was in college. I happend to be home sick one day with the radio on and his show came on, I laid in bed listening to his show. After that, I would try to catch his show during my lunch hour.
It's amazing how many "charter" listeners there are here. I still have the very first issue of the Limbaugh Letter. It's amazing how things change, but remain the same.