You've probably just watched the Rules of Engagement episode where they talk about a fictional app called ShyDial. It's a service that allows you to connect straight to a person's voicemail, without their phone ringing.

• Don't want to talk to your girlfriend?
• Cheating on your boyfriend?
• Calling in sick and don't want to talk to your boss?
• Middle of the night, and just want to leave a message?
• Check in with your parents, without talking to them
• Cancel a date you never wanted to go on in the first place
• Don't ever want to talk to anyone again?

Check out the real business behind it all, SlyDial. They offer a free service and it's literally as simple as dialing 267-SLYDIAL (or 267-759-3425). And yes, they do have mobile apps you can download (Android, BlackBerry, iPhone, and Windows Mobile)-- but the ones we tried sucked. It's much easier to just add the number to your phonebook and use it whenever you need to.