Diagnosed Aspeger's late, GAF 51-60, documented severe sleep disorder all my life.  Sleep clinic chased me home after only 20 minutes of sleep for hours.  Spent 10 years on amitriptyline, only made it worse (triggered severe SVT during sleep, doctors didn't catch that and thought I was having panic attacks- in a dead sleep???), another several years on xanax, hellish nightmares made it monumentally worse, I will never do benzodiazapines again.  Nothing alt helped at all, melatonin and valerian tea were a joke, went through several jars.  Most nights I'm thrilled with 2 hours of sleep at a time and 4 hours total per night, if I get 6 total I'm ecstatic.  I have kept sleep journals, do all the 'good sleep hygeine', etc, but there is nothing on this planet that stops the alpha/delta brain waves crashing together, which means I don't go through transition between asleep and awake when it happens (which is nearly every night), I am just suddenly very awake out of a dead sleep.  My goal is good REM, and I'm super awesome at relaxation techniques, meditating into a trance in bed and skating like a feather on the edge of actual sleep, which really does help alleviate all the irritable nerve feelings you get when you haven't slept well.  On very rare occasions I sleep too hard and wake up nearly immobile, all my muscles locked, and get up to a throbbing headache the rest of the day, so frankly, I'd rather wake up a lot.

I would love to see real sleep studies done on the autism spectrum.  Sometimes there is more to good sleep than simply retraining the brain either chemically (meds and alt) or via biorhythms.  As far as I can tell, I revert constantly to a particular time zone on the other side of the world and have to 'reset' back to my own time zone over a course of a couple of weeks, get a good night or two, then bing, back to the old time zone.  I've tried being a night owl and sleeping during the day, impossible.  I spent nearly 20 years sleeping an average of 4 hours a night (some years better, some worse), and the only thing I can find that works is waiting it out, being patient, stay on track with my usual day hours, spend quality time relaxing, and deal straight out with whatever bothers me in my head so I don't have that running in the background.

I used to sleep walk as a child/teen.  One night I dreamed I was a vampire and dramatically tiptoed my way to my mom's bed and loomed over her, getting ready to bite her neck.  Boy, was she surprised...  I remember the dream because her surprised reaction woke me up in the middle of it.  I think that was the worst it got, but I do remember being so bored at night that I'd take the screen off my bedroom window and go climb a tree so I could watch the cars and street lights.

One more thought.  I grew up on a farm and am currently raising a new batch of chicks.  I can't help noticing through my life that my brain works more like an animal's, I'm capable of responding to immediate action if it's necessary.  Animals react to 'kill or be killed' right out of a dead sleep, they can go into deep sleep and jump up wide awake, and I think my brain is like that.  If human society allowed us to lay down and sleep any time we want, like animals do, I think I'd have slept a lot more.  But between holding jobs and getting kids to school and sports and everything, my sleep time (and all of our sleep time, really) got squished into a tiny little slot.  I cannot sleep on command.  I've never been able to just lay down and fall asleep.  My husband does that with ease.  Yes, I'm jealous.  BUT.  He can sleep through carbon monoxide and smoke alarms.  He can sleep through a tornado ripping by within a mile of the house.  He can sleep through cats mating or fighting on the deck.  He can sleep through a kid crying.  I figure every house needs someone who wakes up a lot... or at least wakes up easily.