I wish I could have been a part of this. This is a far cry from the handheld vendor conference I went to several years ago where the badges didn’t even have barcodes for scanning. Despite privacy concerns I think RFID is a very interesting emerging technology that will have benefits to consumers (well, hackers anyway) beyond the obvious enterprise applications.
Unfortunately I’m not at TechEd this year, but if you are you get to see something pretty cool. All of the attendee badges have an RFID tag embedded in them. As you can see from this article we did take care to make it noticeable so that you won’t get tracked at every expo booth you visit.