Hideaway home gym? Ideas?

contingencyplan

As you can probably guess from my OTHER topic I just posted, I am attempting to put together some semblence of a home gym which is difficult because I do not have a room to actually turn into a gym, nor do I have floor space to devote to any equipment that's going to sit there and take up a sizeable chunk of it when not in use. So I need your help. I need suggestions on things I can add to my collection of home fitness supplies that are foldable, collapsible, or, for whatever other reason, can be stowed away easily when not in use. Here's what I already own:

Some resistance bands
A suspension trainer (two, actually)
A few medicine balls
Some light weight dumbbells (which are pretty crappy and need to be replaced)
A few different varieties of jump ropes
Floor mat
Iron Gym doorframe mounted pullup bar
Pushup stands

Things I will be adding to my collection in the near future: Medicine bag training system and/or kettlebells, and further into the distant future, an aerobic step and a set of adjustable dumbbells that go up to a fairly heavy weight.

Anything else you could suggest?