Thanks for the feedback.
My plan is to produce a number of these programs (all related to analog circuit design) for the HP-67, and eventually for the HP-41C. The latter will be easy because most of the programs can be translated in a straightforward manner.
Regarding the documentation, I've written a sort of "assembler" that takes as input an HP-xx program, usage instructions, register, and flag listings in an ASCII text file, and produces the HTML equivalents. That makes it pretty easy to produce nice looking listings and documentation.
The "assembler" also lets you use symbolic labels when writing HP-35s programs, and automatically resolves them to line numbers when generating the HTML version. Without it, I never would have been able to write my two published 35s programs as fast as I did.
Someday, when I find the time, I'll put the assembler on-line, but it's a little awkward to use right now because it's a Perl script.
Stefan
Edited: 8 Dec 2008, 4:05 p.m. after one or more responses were posted