After having actually seen sporadic play over the last year, there have been a number of changes to the heartbreakier elements of the house rules for my "B/X game" (by which I mean D&D with a Rolemaster vibe, retaining "old school"sensibilities but many modern rules, with all the unspecified bits defaulting to B/X). There are also a number of additions that hadn't previously been detailed or that I've come across since, thought were cool and have nabbed. I'd give credit where due, but there is so much stolen from such a variety of sources that it would take too long and be mostly wrong.
Enjoy and steal alike!