Contact me on Google Wave.

Call from an unfamiliar number, don't leave a message. Keep redialing until they pick up.

When they eventually pick up, play back the sound you hear when you accidentally dial into a fax line.

This is a great question. I'll use this as an icebreaker in the future.

Smoke signals from the house across the street.

at the moment ... in person with a sweaty handshake