I completely missed this when it was originally published, probably due to the holidays, and I wager plenty of others did as well. Raph Koster (of Ultima Online and Star Wars Galaxies fame) has an MUD-DEV [http://www.raphkoster.com/?p=225] mailing list, and is aimed primarily towards designers, but any serious gamer will be able to see the merits in the argument as well just by comparing their gaming experiences.