Well, http://searchyc.com/pg?sort=by_date_r has pg's first post (ID = 1) and what I assume is his first comment (ID = 17).

I lurked for a while before participating, maybe you did the same?

Incidentally that makes pg 1000205 / 17 = 59,000 HNyears old -- and that seems about right, I bet the average reader here cares ~10,000x more about what pg writes than what I write (pg HNyears / davi HNyears = ~10K). :)