Wow, what faith you have--I better try again soon then! They just spawned again this afternoon, so I'll see if I can't free-up a larval tank. The good news is that the babies would be ready to go to new homes in only a couple of months if I ever figure out how to help them live that long...
I think the gold-striped neons are spawning too, but I can't see into their tank very well (Julie, I ended up using that cloudy 20L for broodstock!), so I can't find the nests! I've got a pair of percs spawning in there too, but I can see their eggs if I look from the top.