Heh. I just started working on the Uberman. For the record, the Dymaxion (day divided into 4 blocks) has no recorded instances of success except for Bucky Fuller, and his success is in doubt.
If you're worried about the way the Uberman works, you could try the Everyman (3 hours at night, 5 hours awake, 20 minutes asleep until you get back to the 3 hours at night again).
Anyways, I've had some trouble with oversleeping (I've been forgetting to turn on alarms, my alarm clock getting unplugged, etc), but I'm keeping at it. Aside from the days that I oversleep, I've been doing really well.
Edit: BTW, these are the articles I read when starting:
Steve Pavlina's Uberman log
PureDoxyk's article on Everything2
and tes' article on Kuro5hin
_________________
"Let reason be your only sovereign." ~Wizard's Sixth Rule
I'm working my way up to Attending Crazy Taoist. For now, just call me Dr. Crazy Taoist.