While they are on the mother's back you want to avoid stressing both the babies and the mother lest some fall off. Otherwise babies are not all that much different in care than adults, just smaller food items and somewhat more prone to dessication.
In terms of other resources, Arachnoboards has a lot of information contained within its "Other Arachnids" sub-forum regarding the rearing of young amblypygids.
Thanks,
Arthroverts