On another note: if polyphasic cuts out everything but REM, does that make people more likely or less likely to remember their dreams?

Steve Pavlina's experience was positive- he would lucid dream and remember them better, I believe.

My experience has been negative. My first dream was a nightmare about falling asleep. A later dream had no visual input (but I recognized where things were and what they were regardless). Recently, at least half of the dreams I recall are just blackness and possibly an ache somewhere (though that has become less recent), where I notice it's a dream and attempt to move my hands until I wake up.

My ability to remember what happened in my dreams appears to have deteriorated, but I have no baseline measurement. I remember the content of 0 dreams from this month, and 0 from last month, and the last one which had details I still recall was in August (luckily, at the time I was keeping a dream journal, so I know the night it happened). I typically write in the diary that I'm keeping of the experience right after waking up from naps, but I don't think I've had much to say about dream content after the minute it takes to get from bed to computer.