>> A serious question that I have been asking myself is where does Intel keep its $12 billion in cash?
Short maturity T-bills work nicely for the purpose of holding the nominal value of the cash. But that does not work for the daily transactions of accounts payable and receivable. This is one reason why the government needs to restore confidence in money-market funds immediately. Even before evaluating long term measures. Companies can't write checks on T-bill assets. They need a cash account. And checking accounts higher than $100k are not insured (for the excess above $100k). But Intel needs to have $millions in their check-writing or electronic-transfer account.
This problem is what can cause a catastrophe within days. I don't know why Bernanke and Paulson mixed it in with the different problem of mortgage valuation.