Hey, I thought of something today. You've done growth while sleeping; would it be possible to do shrinking while sleeping? We could see a woman shrinking gradually into her clothes, totally unaware of what's happening until she wakes up small and naked under what she *thinks* is a sheet...
Excuse me, I think I need to go lie down for a minute.
Edit: Ooh! Ooh! I know! *Waves hand excitedly like a teacher's-pet* I had another idea! I don't know if you could do this one, but...
It'd be a 2-girl clip. One is participating in a sleep/dream study, the other is a researcher. The one sleeping starts to dream she's shrinking, and she actually does...and it also affects the researcher monitoring her. Inspired by the title of your website, you could call the clip "Shrinking Dreams." *IF* this is doable, it could potentially be pretty awesome. And if it starred Megan and Nikki, so much the better.
EDIT: For maximum epic win, the sleeper enjoys it and the researcher doesn't. All our base are belong to a clip like this...
If it's not feasible I may just have to write a short story instead...