Shortly after the July workshop last year, I adopted the polyphasic every man 3 schedule (3 hour core sleep with 3 20 minute naps). It seems to be working for me. Though others who tried it have given it up. I suspect the every man 1 schedule(~6 hour core with 1 20-30 minute nap) might be more generally achievable.

During the workshop itself, I just got less sleep (like 4 to 6 hours per night), and this was OK because, as near as I can tell, I was only deprived of slow wave sleep, which takes a week to cause problems. Though I think the only person to get less sleep than me was Matt, who was already polyphasic.