The MacHack 180 Year Retrospective

I didn't realize that this year was a significant milestone in the history of this conference until I saw this year's coffee mug, and I'm sure many of you were the same way. I felt we would be remiss, then, if we missed this chance to look back.
Unfortunately, most of the records are lost. I've spent the last few days scouring the web, though, and I've discovered some fascinating things. Among them: an answer to the riddle of how MacHack 13 marks the conference's 180th anniversary.