This is a pretty useful thing. Couple of ideas that come to my mind for its use are

1. Use bluetooth to lock your computer
2. Use bluetooth to change Messenger Status
3. Use bluetooth to play/pause a movie
4. …

Here is a list of AppleScripts for the ideas above

Start Screensaver using AppleScript
try
tell application id "com.apple.ScreenSaver.Engine" to launch
end try
Stop ScreenSaver using AppleScript
try
tell application id "com.apple.ScreenSaver.Engine" to quit
end try
Please note that if password on wake is set true then it will ask for password

Go Away in Adium using AppleScript
tell application "Adium" to go away
Available in Adium using AppleScript
tell application "Adium" to go away
Play and Pause VLC using AppleScript
tell application "VLC" to play
The same script plays and pauses a file