oh gosh. if i have that many babies what will i doo!!!!! i thought my tanks would be like, good enough to live and thrive in, but not enough that i'd have spawns! i wonder how often/if the danios spawn. i mean they're egg eaters but i have to wonder. the cory eggs are around the size of a betta pellet. actually bigger than the ones i feed my bettas (they are crappy pellets u.u) but i bet the danios will try/are trying to have the snacks.
Danio fry probably will only survive if you have lots and lots of fine-leaved vegetations like cabomba and water sprite. Since I've never had cories spawn, I honestly couldn't guess at the survival rate but I think that's pretty awesome that they're so happy in your tank. :)
EDIT: Jig-galy puff, jiggaly puff . . . I always loved that little bugger.