As described in the
polyphasic sleep logs thread, I'm currently on Day 11 of a biphasic sleep 30-day trial. Right now it's 6 hours total per night (2am to 5am and then 9am to 12am), but eventually I'd love to get my sleep cycles to shorten so I only need 4 or 5 hours.
Heh, tropicality, you forgot to put a 2-hour option for Uberman polyphasic sleepers
.