Actually, it was held in San Jose from 1989 until around 2000. (I don't remember the exact year it switched to San Francisco.) The new venue is the old venue (San Jose Convention Center) but, I understand, it's been greatly expanded since they were last there. Back then, the conference had around 2500 attendees and the center was full.
Sorry, you are correct. My first year was 2001*.
*Maybe 02, I remember because a lot of people were walking around with leather jackets with the OSX logo on the back and I asked someone and they said they handed them out the year before.