I'm certainly enjoying the series on RPG.net and am looking forward to seeing the next article. I can only imagine the amount of work you have to put in though, so it might be a question of diminishing returns as you move on to long-dead companies (where the information is harder to come by) or smaller companies (where the audience is smaller). Have you put out a call for other people knowledgeable in the industry's history to contribute, or at least be interviewed for their insights?