Ok, not Microsoft's, and not a web technology:
[link|http://www.washingtonpost.com/wp-dyn/articles/A37144-2003Jul10.html|Posting Prompts Complaints on Smart Tags]
"The radio tag being developed by Auto-ID can help companies track their products through the supply chain so that, for instance, they know exactly when a batch has moved from the factory floor to a distributor, or when a particular store is running low."
Sounds very useful in a manufacturing and supply chain environment.
"The Auto-ID center has repeatedly stressed it does not intend to create technology that would be used for monitoring once a product is sold and leaves the store."
Sounds like there's a lot of potential for abuse. I wonder how they propose to prevent this.
Brian Bronson