I really couldnt find a proper home for this question so i chose my favorite garden amendment forums...
Inside diapers are these supersoaker beads...they are tiny things made out of soy somehow. I keep looking at these diapers thinking...with a bit of scissor action, i could have those super soaker beads to add to my garden and pots to keep them moist...bonus is they are full of urine lol.
The absorbent stuff in disposable diapers (including G diapers) is the same stuff that is sold for gardening to hold water in the soil. So if you're comfortable using that, there's no reason not to compost it with humanure.
Diego Footer on Permaculture Based Homesteads - from the Eat Your Dirt Summit