Web 2.0 Bluetooth app with comments, tagging & likes

Stalk devices and get notification when you're near them. Or connect to Facebook and see what you've common with people around.

Simple bluetooth chat for mobile phones.
In theory, restrictions on the number of users there. For messaging applications create several ad hoc network using a data transmission channel bluetooth. Check in practice:)
Features
Application built on principle of dolls - embedded into itself, and can transmit itself via bluetooth using OBEX File Transfer.

Bluetooth GPS compass is a free J2ME application that displays GPS data graphically . features include satellite azimuth/elevation, GPS signal quality, analog gauges.