If you’re desperate to get by on fewer hours of sleep, polyphasic sleep (a.k.a. the Uberman’s sleep schedule) may be the answer! Basically, you do weird things to your sleep schedule and practices to maximize REM sleep.
Unfortunately, all the bloggers who were going to test polyphasic sleep on themselves seem to have quit the blogosphere in 2002. I hope they didn’t die… someone suggested that they were recruited by the NSA to train agents, but I think they were snuffed because they were getting too close to the secrets of the Illuminati 😉 At any rate, this seems to imply that the sleep schedule was not practical, if 4 bloggers couldn’t maintain it with each other’s support and the eyes of the community watching them.