http://www.wired.com/gaming/virtualworl ... rentPage=1
It's a nice retrospective on PA and contains some interesting background information. It's quite amazing what a long way this comic strip has come and the recognition it receives, but I might want to add that the author comes across as a bit of a sensationalist to me and exaggerates in certain passages, so while I am not up to do date with "wired"'s current target audience, it certainly has a mainstream media feel to it.
Anyway, enjoy!