This is cool:
Nokia is making a mobile that lets you write short text messages in mid-air.
The messages are written using a row of LEDs fitted on the rear cover of Nokia’s forthcoming 3220 phone.
A motion sensor in the phone makes the lights blink in a sequence that spells out letters when the handset is waved in the air.
[To the tune of ‘Til Tuesday, “Voices Carry (Single Mix),” from the album Coming Up Close – A Retrospective.]