Google has yet again created a utility that could revolutionalize the cellphone world. This new application is called “Google Voice“. Following are the general features of this application:

1. Call Screening: This allows users to customize the screening for all callers or unknown callers.

2. Listen In: It works like an answering machine. It allows user to listen to the voice mail that the caller is leaving and then chose to take the call.

3. Block Calls: This allows user to customize the callers or unknown numbers to be blocked and provided a standard voicemail message also.
Voicemail Features

1. Notification: Allows you to get an email / sms if anyone leaves a voicemail

2. Listen to Voicemail: Allows you to listen to the voicemail through your cellphone or over internet

3. Personalized greeting: You can customize greetings for different callers.

4. Share Voicemails: You can forward voicemails to anyone.

This is still in Beta phase, as most of the new Google applications. You can register with Google to use this as a beta user since the usage is invitation based only (reminds of how Google started Gmail).