It was not just mtgox. Every single exchange and major exchange rate outlet was down. #2 post on reddit was about how the economy was crashing in one of the most circle-jerky discussion boards in history, posted by a brand new account. volume was higher in that spot by more than double: http://www.bitcoincharts.com/charts/mtgoxUSD#rg60zig6-hourzm1g10zm2g25zvzcv
my honest opinion is that there was a coordinated attack.. not on bitcoin, but on the holders.. not the early adopters for the most part, but those who bought in because it's the greatest investment since sliced bread.. those that are buying in highest and taking the most risk. it was an attack against those people.
i guess there will be more.
pre-edit aka inb4 "it was just a ddos": if you were trying to get current price information from one of the plethora of different places you generally get it, or, you have some other enlightened analysis, please prove me wrong say more.