I do not really believe Gox can run with their customers' money, so as long as they're making shitloads of cash every day (from trading fees) I wouldn't be too worried. I only have about 1k eur at gox personally, though.
Why run with clients money when you can just sit in your office with clients money? How much USD worth of pending withdrawals dating back as early as August 2013 do you think they're sitting on?