One way the current crisis could nix Greek euro membership is if the bailout fund - the EFSF - refuses to dole out the relevant billions on a date coinciding with the Greek state having to use said billions to repay its debts.

BBC: Watch deposit flight, not the eurocrats

Although the number of Units gifted is fixed on the date of the gift, that number is based on the fair market value of the gifted Units, which cannot be known on the date of the gift but must be determined after such date based on all relevant information as of that date.

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His idea: To create a system that would be continuously updated by drivers themselves, giving everyone all the relevant and up-to-date information they need to decide which roads to drive on.

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