The second day of OSRCon was a long one for me, beginning at 9:30 am and finishing at 7:30 pm, with scarcely a break. That probably explains why, by the end of the day, I had a terrible headache that prevented me from fully enjoying the AD&D game I played with Ed Greenwood as DM in the afternoon/evening (about which I'll say more later).
The House of Portals is a big level and one that's been extensively -- though not completely -- explored by the players in my face-to-face Dwimmermount campaign. Consequently, when the players at OSRCon came to various rooms, they saw evidence of my regular players' actions in the way that certain traps had already been sprung or items were missing from where they expected them to be. To me, Dwimmermount is a "living" place, constantly changing in response to what happens in any sessions I run using it. Until now, though, I'd never run a second group through the dungeon, so there was never an opportunity to highlight this fact in quite this way. The OSRCon players found it intriguing and noteworthy enough to comment on it a couple of times. For a moment, I got a flash of what it might have been like to have played in one of those early campaigns of old, where there were 20+ players who all explored the same megadungeon at different times.
At the end of the session, several of the players expressed interest in continuing their explorations later. They'd just found the portal to the Red Planet of Areon -- two of them even went through to see that the portal still worked -- and were really keen on spending more time there, but we ran out of time. That's why I'm thinking ever more of starting up regular open-ended Dwimmermount sessions on Google+ in the near future with a rotating cast of characters (and players). More on that as details become clearer.