
I've just been on the phone with those nice folks at Filter | Worldwide in London and we were talking about how their proximity marketing system call BlueCasting could work for my client. Essentially, it is a mobile marketing solution that utilizes your smartphone's Bluetooth capabilities. BlueCasting deploys small transmitters that transmit up to a 300 meter radius and when you walk within the range the transmitter detects you and send you a short message with a Bluetooth icon. If the user opt-ins, its gotta be a sexy message, then the transmitter can deliver files such as a still image, a sound sample, a video clip, a MIDI file, a WML deck, or a vCard/vCal event.
Now if you are running this in, lets say, Times Square or Tokyo, you are in luck. The market penetration or saturation of Bluetooth devices is deep but in Kansas City, you might not have such good numbers at the end of the day. However, the good news is that this type of marketing operates on three levels: 1) audience proximity, 2) viral buzz, 3) pr buzz. Nike, Absolute, Discover, etc have jumped on this. Nike built out a massive program in Tokyo that was a city-wide interactive scavenger hunt for sneakers. Crazy, right? Very cool? Oh yes.

