Hm.. on one side, it'd happily agree, since retro stuff is cewl and always was exciting, but on the other hand, 1) there already are DOS and Win 3.x forums around and 2) it's the OS/2 Community World Forums, not retro OS forums.
Not sure if DOS and Windows would benefit this forum. This might bring new users, topics and ideas, but then it's still a forum about OS/2. (It's like going to a bakery shop, just to find out they also have a butcher now ; ) - Would be nice, since if you need both, you'd have all done in one go, but on the other hand.. that's a bit strange. :>)
Hmm.. maybe a vote would be a good thing. Do we like the idea YES / NO, and depending on that, poor Martin would have to redesign these areas.