If you really want to, I don't see why you can't stash some cloth diapers away for barter. And I would throw in a couple plastic pants (though the plastic might get brittle with time) to put over the cloth diapers too. Maybe some diaper pins. Most women these days probably don't know much about using cloth diapers, so even printing out some info to stash with the cloth diapers might be wise. These won't take up much space. Here is a page on diapers for emergencies: http://home.att.net/~ofuzzy1/diaper.htm You could make up a small box of diapering supplies to keep with your other emergency stuff. I can't seem to make the above link work. You will have to cut and paste.

One problem with using cloth during emergencies is washing them when there might not be much water. So for a short term emergency disposables would probably be best. Though you might want to rotate them if what Eugene says is true and they degrade after a while. We used cloth diapers, as disposable's weren't widely available when my girls were little. But I liked using cloth myself. Washing them was a pain even with lots of water.

It seems to me if you come across someone that might need diapers in an emergency or during hard times, then you could trade with them (or just give it to them) without letting the whole neighborhood know you have supplies to barter. You don't even have to let the person you are trading with know that you are bartering or know that you have other kinds of supplies. I think if I were doing this (bartering in hard times), I would deal with each person one on one and not use the word bartering. Hopefully that would prevent it getting out that you have stocked up on supplies. Something like that anyway!

Nitro-pak has a little book on bartering. http://www.nitro-pak.com/product_info.php?cPath=23_132&products_id=287

For women:
And women reading this can even get cloth menstrual pads and supplies for long term emergencies. In the past I have seen sewing patterns online so you can sew your own. Here is one brand you can buy (I have seen these for sale in some health food stores): http://www.gladrags.com/category/reusable-menstrual-pads Or you could buy one and use that as a pattern to make more.

Joy