My name is Mako, and I have been DMing since 1979. I have run many pBp games, and currently have a very successful campaign going on the OD&D74 board, which is in its 8th year.
I have always wanted to do a straight dungeon crawl, where logistics like light sources and food become important, and the goal is to go down and outwit, out-fight, or out-maneuver monsters and traps to gain treasure and levels, and then go back in again! Plots need not apply (although I have a thin framework to hang the dungeon delve on). It is all about the joy of interaction and exploration, using your wits, your resources, your imagination, and your character's skills to overcome puzzles and obstacles to gain treasure and power.
Most of my games are what I call 'vanilla'. I have found that vanilla monsters plus vanilla treasure plus vanilla maps plus vanilla character classes and races, when inter-twining after given a slight 'twist', makes for an easily understandable but enjoyable game. I was going to house rule some OD&D, but then I read Simon's brilliant ruleset and vowed to use them as my next set of rules.
If anybody here is interested in a straight dungeon crawl run on these boards, please chime in on this thread. My campaigns have high death rates (26 casualties in 7 years) and pull no punches (sometimes you have to run, and sometimes you are just unlucky...) but seem to be popular. If you want to check out my DMing style, you can go to odd74.proboards.com and check out Makofan's Verbosh Campaign and browse the posts.
I think 3 characters would be the minimum, and more than six would get unwieldy