Rob MacDougall has written a second post on the history of role playing games. This one looks at the links between R&D and D&D. It's a must-read! And totally fitting that this is Mostly Harmless's 200th post!
[Update 6/23/07: But even more fitting that I posted this out of my intended order so that the LPGA post up next turned out to be the actual 200th!]