For those you that are running adventures based on the LBBs, I can’t recommend enough the Original D&D Discussion forums. They’re a great gaming community and excellent folks to chat with. Their material and topics are also top-notch for those interested not only in OD&D as hobby history, but also as a game to be constantly played, tested and developed.
The Simplified D&D Combat that Scales – by the user waysoftheearth – is my latest finding there. It’s a really amazing analyses of the OD&D combat matrixes, besides an intelligent (and fun) fix to make combat scale to their higher levels (especially if like the OD&D damage rules where every strike does 1d6 points of damage).