Pinger, a pretty cool vmail service

Pinger is instant voice messaging for your mobile phone. With Pinger you send voice messages directly to someone instantly—no ringing, no greetings, no lengthy prompts. Pinger is fast and efficient like email, but with your voice. It's mobile like text messaging, but with more personality.

You're mobile and you need to get a message to someone. Is she sleeping? Is he with the kids? You don't want to interrupt—you just need to get the message out. With Pinger you can say it right now without ringing their phone, but with the speed, personality and emotion of your voice.

http://www.siliconbeat.com/entries/2006/08/23/pinger_a_pretty_cool_vmail_service.html