Here are some useful online resources if you want to find out more about polyphasic sleeping patterns.
About Polyphasic Sleep
Real life experiences
Steve Pavlina’s experiment in 2005: http://www.stevepavlina.com/blog/2005/10/polyphasic-sleep/
PureDoxyk’s ongoing polyphasic life: http://www.puredoxyk.com/index.php/about-polyphasic-sleep/
Buckminster Fuller’s Dymaxion sleep pattern: http://www.time.com/time/magazine/article/0,9171,774680,00.html
Take a Nap! Change Your Life by Sara C. Mednick – Very interesting and accessible book about the joy of naps.
See Sara in this Google Author Talk in which she addresses the whole scope of the book and also a lot of very pertinent questions from the audience – including one about Uberman.
Polyphasic Google Group: http://groups.google.com/group/Polyphasic
Cognitive Testing Resources:
Reactions Test: http://cognitivelabs.com/alz_assoc_refertestpage2.htm
Simon Test: http://www.thepcmanwebsite.com/media/simon/
Typing Test: http://www.typingmaster.com.au/java/ttapplet.htm