Show Me the Money

Now that a federal appeals court has ruled that our paper currency discriminates against blind people, what would be the fastest, easiest, least expensive way to remedy that situation -- without creating a whole new set of problems?

Some countries use different size bills for each denomination. If we do that, what else will be impacted? For starters, all those vending machines that take paper currency will have to be retooled or replaced.

What would be the cost of imprinting cash with Braille? What measures would need to be taken to prevent those raised bumps from wearing out too quickly?

If the solution were left up to you -- if you had to devise the best way to alter paper currency so that blind people could identify each denomination -- what would you do?