Bloomberg Currency Calculator Offers the ability to determine the rate of exchange between any two world currencies (over 200). 6 other calculators also provided
Pacific Exchange Rate Service Prepared at the University of British Columbia; has daily rates for 65 countries laid out in a very nice table (if you need a snapshot of all currencies for the current day).
Rates Daily foreign exchange rates, information about currencies and currency derivatives, and a converter for 50 currencies.
