There's always been talk about how Bluetooth can be used for advertisements when a person with a Bluetooth-enabled mobile device comes near an object, then an ad can be sent. It's been talked about and done in research labs, now there are actual deployments being done. In the UK, a system called Bluecasting does this with subway billboards. They call this proximity-based broadcasting, and this really targets users who would be most interested in it, because they are near the ad so they must be somehow looking at it, or somewhat interested in it.
Wouldn't it be cool, that you could have e-coupons or discounts on your Bluetooth phone or PDA when let's say you're in an Indigo bookstore or Best Buy store? And if the store has a profile on you on what you like and what you have bought, it could let you know of items that you may be interested. Think Amazon but directly in the store.
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