My first idea was a dating service using cellphones: People can have profiles with a picture on their phone, when they come in range of others with a compatible profile, their phones will let each other know, exchanging profiles, pictures, and contact information.
Quickly after searching for this in google, I had found that some MIT students had already done this, or at least come up with the idea. Blind Dating Via Text Messaging
Second idea: I was thinking that restaurants, stores, clubs, drug dealers, and other businesses could somehow send out a text message to people who come within range, with their information such as special events, prices, menus, special offers, etc. Bluetooth in Grocery Store
Third idea: With your cellphone, you would be able to purchase products in an actual store while physically in it. For example, if you a see a cd and want to buy it, but don't want to wait in line, you can use your credit card to purchase it on your phone. A signal would be sent that turns off the signal emitted by the cd so that when walking out of the store, alarms would not go off.
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