1) Is S-100 still supported or available for serious home brew? Does anyone still actively sell new boards, cases, designing, support, etc? If not, then about what year did S-100 development stop?
2) If S-100 is still supported what is the most popular OS and basic configuration (if there is one)?
[ I built my first computer as a Z-80/CPM based Altair system (~1978) and eventually donated it to a business in about 1990. As I remember it, a company named Morrow (or something like that) still was selling business systems at least to the 1987-88 period and I think S-100 was still going well enough for advertisers in the computer magazines. My system consisted of a case that supported about 20 cards and had a power supply that brought the weight to about 40-50lbs. I had another case that held two 8in floppy drives and weighed about the same. Both cases where approximately 18" square and 10" high!]