MtGox has to be where market manipulators live - and they run the coin prices up every day. Now that it's not trading at the moment over there, the real demand is meeting the real supply.
If they stay shut down for a while longer, it will give all the horders and speculators a chance to rightfully panic and sell. $60 is not the bottom.
"@MtGox Maintenance Over however we are now under a DDoS attack." [1]
Mt Gox has taken a credibility knock, which has a ripple effect on the BTC pricing right now.
Overall it probably a temporary setback, but does bring to light irrational exuberance voices ignoring others that were calling for a more decentralized ingress/egress between USD and BTC. IOW bitcoin needs more exchanges to drive competition, and perhaps even meta-exchanges too.
I don't think it's at all unreasonable to think that each of those sites would have naturally seen their greatest traffic surge with the events of yesterday. For example, over 20% of all subscribers were present on /r/bitcoin (for comparison, (eg) /r/android is currently at about 0.5%, /r/bitcoin is around 10% now).
I'll see if I can dig up sources.