I won't actually participate meaningfully in this conversation but;

I just recently saw a group of hybrid darts (presumably Dendrobates tinctorious x auratus) that are now owned by a very well know hobbyist. They were probably some of the prettiest frogs i've seen. Big like regular tincs, reticulated like some auratus and varying degrees of color from white to blue. They were awesome! I would love to have a tank full of them.

~Alex

(Please don't regard the above as an endorsement for creating hybrids...)