I'm going to attempt this, but I don't have experience with exotic species. I hope someone will chime in later and help you out.
I had a run in with tongues not working once, and actually my toads prefer to more or less lunge at their food now.
I realize your not going to feel better until you see him eat, but it may be apart of the behavior pattern to stop eating. Even though they are tropical, the wet and dry season could stimulate a form of hibernation, and in those cases, toads will refuse to eat simply to avoid contaminating themselves with their own feces.
they're diet seems similar to what i would expect. if you are in a more temperate American climate, i would suggesting finding some pill bugs, when my first toad was too small for crickets or anything else, he took to them nicely and recovered from starvation when I rescued him. I just always recommend them for the calcium, and because they are very easy to eat, and it would probably give his tongue a break encase it needs to heal for some reason.

In the meantime glance over this topic
http://www.frogforum.net/toad-care-a...-breeding.html

and if I have some time I'll see if I can't google out someone who's had a similar problem. I apologies if this information doesn't bring you the comfort your looking for, but at least you'll have a couple people here looking into it for you. I think people are going to ask you questions to see how regular his gestation is to determine if whats going in is coming out. lots of people are concerned about impaction, and may ask about your setup to see if there is anything harmful in the terrarium. Basically the more information the better, so feel free to lay out all the cards. I know you've been moving him around, I'm not saying it shocks them, but generally I'll have a toad that will go into hiding for a week whenever I handle them or give their homes a makeover, he'll come out thin, but he always fattens himself back up.