"RFID chips are being embedded in everything from jeans to paper money, and your privacy is at stake."
When Wal-Mart talks, suppliers listen. So when Wal-Mart said that it wanted to use bar codes as a better way to manage inventory, bar codes became de rigeur. If you didn't use bar codes, you lost Wal-Mart's business. That's a death knell for most of their suppliers."
This article goes on to give an extensive list of items that RFID tags are already in, (such as your luggage if you fly Delta) consumer items that they are planned to be put in (Like Michelin tires), as well as a plan to begin putting them in the Euro.