Indeed.  That would certainly be the first hurdle.  I suppose it would have to be a highly entrusted member of the community - perhaps someone from the foundation.

Second, we would need to leverage a preexisting aid organization on the ground.  Sure, they may be reluctant to accept small donations in BTC, but I can't imagine any aid organization would say "Sorry, we only accept Paypal" when you are offering them the equivalent of $1MM.

Perhaps Bitcoin is not yet at a point to be an effective/efficient means of transferring value to disaster-relief efforts, but the potential is there.  If I go to Unicef right now and make a fiat donation, how long will it take for those funds to be extracted from my account and be available to purchase food/water?  I don't know the answer, but I know with BTC it could be near instant.