The Sony Ericsson Clicker is a remote control for Macs using Bluetooth phones. This small (148 k) application lets you remotely control your Macintosh from a compatible Sony Ericsson phone. What could you do with it? Control PowerPoint or Keynote when giving presentations. Control DVD Player or iTunes from your sofa or bed. Use AppleScript to control anything you like. Further, Sony Ericsson Clicker has a built in “proximity sensor”, allowing you to trigger actions when you leave or come back to your Mac. You could pause iTunes when you leave the room, turn it on when you come back. Use AppleScript to let your presence (or absence) control anything you can dream up.
Mac OS X 10.2.4 or higher
Supported phones: T39m, R520m, T68 or T68i
Compatible Bluetooth adapter
More info and download link here.