My next project is a spanking bench; couldn't find a good concept picure, but basically the horse-style type.
I've already made a couple crosses, and they're actually pretty easy to tuck away (4 bolts, maybe 1 minute with an adjustable wrench, takes them apart).
I made a bed as well, although it was rather a pain and not like the pictures above at all (no posts or superstructure). It's a two-part assembly that splits down the middle for portability (connects with pull latches), it has 14 flush rings around the edge for tie downs.
I also made a toy rack, which was almost the best project so far. Nothing like rifling through a half dozen drawers looking for THAT ONE TOY to kill a good rape scene!
If people are interested and I can find my bloody camera, I'll post a few pictures.