RFID Tags are are begining to be used in greatly increased numbers.
It might be interesting to develop an applciation that working with an RFID scanner, will detect and create a description of all of the tagged Items. This can be used to create a unique "fingerprint" based on the different combinations of items, or just for fun. Companies such a Prada already embed RFID tags, and Walmart is about to start aswell. There are many ethical question related to RFID tags. While they may greatly help with supply chain management, they can be easily abused.