Thanks everyone!
Eric, I don't find them that hard to keep. Warm temps, high humidity in the tanks, regular misting, and provide them some cover. Some are easier than others.
The blue ones are a locale of Dendrobates auratus. These are fairly large for dart frogs. These come from the El Cope region. I got my trio from the original importer of this line. I'd say the auratus are some of the easiest PDFs to keep.
The orange one was Ranitomeya lamasi, which has now been changed to R. sirensis. These are TINY.
The red one is Oophaga pumilio from the Almirante population. As Rick said, these have been considered difficult to breed until fairly recently. Oophaga translates to egg eater, and this leads to much of the breeding difficulty. The female frog must feed the tadpoles unfertilized eggs. Many methods to raise them artificially have been unsuccessful. I find these the most interesting mostly because of their parental strategy.
Overall, I think these are easy to keep as long as you can culture fruit flies successfully, and I find the frogs just as enjoyable and rewarding as my orchid collection.