Not only are numerous "currencies" not exchangeable, but the exchange rates are the biggest ripoff I've ever seen. If you consider that an America West point is roughly equal in value to an Aeroplan point (since 25,000 of either will get you anywhere in N. America), this service is charging an 80% or more premium for exchanges. If this really was currency, these guys would be sht down by consumer protection laws! Unbelievable!