I think I've seen some posts on them at kingsnake.com's forums. You might be able to find some good advice on the care for them there.
As for overfeeding them. I have a bad habit of doing that to my captives. I try to give them smaller proportions 2 - 3 times a day, but some times I get busy and try to make up for it in one serving, and a half hour later they look like they don't feel like moving :) I've never lost anything by overfeeding, and I don't mind them being a little more "healthy" than they would be in the wild. I'm sure you could probably feed them to much, but the way I look at it, I would rather be stuffed then starving.
Here's a link to kingsnake for you, good luck!

Here is a link that might be useful: kingsnake's forums

When looking for information always use the scientific name, you should be able to find much more useful information than when using the common name. The scientific name for this species is Dyscophus antongili.

Here is a link that might be useful: Care for Dyscophus species

I was looking at the care sheet that Petsmart gave me and saw that the species that I have is dyscothus guineti, or so it says. I didn't see that the first time I looked at it. Maybe I can find something on them now. Thanks all! By the way, the one that I had to clean off after dumping dirt all over it still hasn't moved from the spot. I hope it is okay.

Kristi

Kristi, the frog should be fine. It's probably a little traumatized, so by natural instinct it will sit very still for a long time.

Okay, good. Now it has moved and gotten under the log, so it looks okay! I am having so much fun setting up this terrarium, feeding the frogs, etc. I am working on another tank now for darts.
Kristi