Mtgox's failure today is shameful. I have an account there for 2 years.
If they don't want to lose the trust of the community they must explain in full disclosure of what happened today.
Everyone rushed to sell their coins around 7-9 hours ago. They're probably getting DDoS'd right now; it isn't their fault. Even paypal went down when they were getting DDoS'd enough (let's face it, paypal is way bigger).