Control OS X with your T68i
The Sony Ericsson Clicker - Clicker
lets you remotely control your Macintosh from a compatible Sony Ericsson phone. Further, Sony Ericsson Clicker has a built in "proximity sensor", allowing you to trigger actions when you leave or come back to your Mac. Downloading now...
After trying it: That is a cool fricken app! On the T68i, the controls are at Connect -> Accessories -> Macintosh.