MyBitcoin is a Limited Liability Company, so the owner(s) is not personally responsible for the company's debts. This is a very good thing, because it allows entrepreneurs to start risky ventures without putting their entire lives on the line. If we didn't have limited liability entities, there would be a whole lot less innovation, a lot less wealth, and a lot fewer jobs.
Tom Williams,
You better come up with %100 of everyone's bitcoins ASAP even if you need to buy them with your own money from one of the exchanges.
Those bitcoins are YOUR responsibility.
I can think of times in my life where I made mistakes, and paid tens of thousands of dollars out of my own pocket to make things right.
Now it is your turn.
Do the right thing.