I know, it's supposed to be de-centralized from government hands, but who's to say Mt Gox doesn't have another huge hiccup next week wiping BTC off the face of the earth? (highly unlikely, but you get my point).

People will go to sell at the highest price possible which is what Mt Gox has been doing, so you have camp bx do the same thing, btc-e, etc, the amount of people needed to ddos 4-5 sites compared to 1 main exchange, less chance of panic selling, and a faster growing currency.