Comment Funny you should ask... (Score 1) 258
...because I outlined potential uses 5 days earlier.
Probably my favorite idea is a type of scavenger hunt with clues that are decoded from Free Text tags posted around the city. Find a tag, decode the clue, leading you to the next tag, etc.
The other great use would be integration of a tag into your address book, so that if you want to transfer your contact info, just let someone snap your vCard tag off your phone screen.