I have been playing B/X with but one player, our own Timeshadows. While Flynn seem ready to hop on board, that still leaves me with a little dilemma I have been considering...
B/X is rather deadly, and when you are playing with only one or two players (plus assorted retainers), you risk stalling the game out on a fatality. In my AD&D game, by contrast, there have always been four to six players... if someone dies, there is a large party to move on.
To that end, I'm considering using a modified version of the Death and Dismemberment table that seems to float around this corner of the Internet on a regular basis. The concept is similar to how damage works in Warhammer Fantasy Roleplay 1st and 2nd editions. (I have no idea about the 3rd edition, nor any desire to find out; if I want to spend $100 on a fucking board game, I'll buy Descent: Journeys in the Dark and one of it's expansion packs, thanks.)
To break it down for the uninitiated: hit points mean jack until you drop below 0; then every hit sends you rolling on a table to see what horrible thing happens to you. In Warhammer, it's generally pretty grim... broken bones, blinded by blood in your eyes, and lots of dismemberment and bleeding to death and crushed skulls. Throw up the horns. The OSR version is a lot softer, with most of the results being knock downs, knockeouts, etc... generally people only assign real, actual death on snake eyes.
My table will probably have a higher chance of being killed or mortally wounded, but it will at least give my B/X game a little less lethality, which I think is important with a smaller party.
....of course, only player characters will get to roll; all monsters and retainers will continue to buy the farm when dropped below 0 hp, with those who are knocked to exactly zero having a round or two in which to be healed before buying the farm.