This is pretty serious IMO. First, MtGox makes it virtually impossible (or painfully slow) to withdraw cash. Now it's impossible to withdraw your own Bitcoins. What kind of Business/exchange is this?
I have a fortune of 0.64 BTC in my MtGox account and I seriously think I have lost them forever.
Price of BTC is in free fall, not only on Gox, but also on other exchanges (been watching last 2 hours).
Panic selling anyone?