RFID Tags in Euro Banknotes
psychictv writes "CNET News.com is reporting that Euro notes could be embedded with RFID tags in the future. 'RFID (radio frequency identification) tags also have the ability of recording information such as details of the transactions the paper note has been involved in...'" The EU has been considering this for a while. You'll never even know they're there.
As a point of information, the laws of the European Union and its constituent states are in general vastly more protective of individual privacy than those of the United States and its constituent states.
The EU's privacy laws were considered so restrictive to trade by the United States that they actually came up at the World Trade Organisation talks. The outcome was the "Safe Haven" registration system for US companies wishing to store data on EU citizens.
There are some exceptions (notably the United Kingdom), but in general one's privacy is more protected considerably more by EU law than by US law.
Neither protection excuses you from the necessity to provide your own privacy, should you desire it, of course.