Drizzt Nightstalker
If either of you watched the 3rd episode you would know that Amon's family was killed by a Firebender. Aang died of old age and Katara is still alive. So no the theory of Amon being Bumi can't be true.
I have watched the third episode.
Amon is the bad guy here, if you haven't noticed. Most people have speculated that they aren't buying the whole "family killed by firebenders" thing.
Bumi is also still alive. Yes, Aang is dead. Katara is not. Bumi is a full grown adult. Why would his parents have any effect on him being Amon? It's also known that Bumi is a non-bender, so it could very well be true.