From what ive heard you breed them like and other egg scatterer, by using marbles or wire mesh to separate the eggs from the young once hatched. But with tetras im pretty sure the fry and eggs need to be kept in complete darkness and are hard to breed.
someone please correct me if im wrong
Neons can't be that hard to breed. They're the most widely available fish in fishkeeping!
who knows, i might have some eggs but not intented to though 
yeah i do have eggsits not the spawning that is the hard thing, its the raising of the fry, neon spawn at dusk, ive got a tank with 4 black neons in it to keep bacteria going until im ready to transfer my rainbows into it, i really should take a good look in there b/c the tank has been in a dusk condition since i've put them in there, will go and look nowwho knows, i might have some eggs but not intented to though
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well i think they are, take a look at this picture, had to take the pic with no flash on so not to harm them, got about 12 in there, the fish have been there for 4 days and all jumped over the divider to the smallest side but decided to leave them there, ive never seen neon eggs before so an experinced eye might be able to confirm this for me.
/www.angelfire.com/tx3/aquariumpets/breedingneons.html
/groups.msn.com/Breedingtropicalfish/neontetras.msnw
/www.fishpondinfo.com/neon.htm