This is perhaps the post / experiment I most enjoyed with Pavlina. He wrote a lot of good stuff, I fell out of love with his stuff a year or so ago but this is one that I really enjoyed reading about.
I posted this because there was a lot of interesting discussion on the Matt Mullenweg post in regards to his sleeping patterns.
My lifestyle would make it hard for me to try polyphasic sleep, but I could see where it would help my productivity if I could pull it off.