Remember the good old days, when SDCC selling out before the first day of the show was a big deal, and a surprise? Yeah, me neither. (OK, I do remember those days. I even remember when you could buy tickets at the door!)
I just stumbled across this ad while reading an issue of CBG from June 2008. So the issue would only have been published a couple of months before the con. And there still would have been tickets available. And you could just go on the web site and buy them. Imagine that!