Google has updated its Google Voice application allowing users of Blackberry and Android phones to place outgoing calls from their Google Voice number easier.

Previously, to place a call using Google Voice, users had to dial their own Google Voice number from their cell phone or use the Quick Call button online. With this new mobile app, users can make calls and send SMS messages with their Google Voice number directly from their mobile phone. The app is fully integrated with each phone?s contacts, so users can call via Google Voice straight from their address book.

The mobile app allows users to access their voicemail (read message transcripts, follow along with "karaoke-style" playback of messages, read SMS messages sent to their Google Voice number); place calls that display their Google Voice number from their address book, the app dialer (Blackberry) or the native dialer (Android); send SMS messages that display their Google Voice number and place international calls at low rates.

Users can download the app from the Google Voice mobile site at m.google.com/voice. It's also available in Android Market.

For those who don't have a Blackberry or an Android-powered device, Google offers a mobile web version of the Google Voice site (accessible by typing www.google.com/voice into a mobile browser) that allows users to access Google Voice features.

Currently, Google Voice is only available in the U.S.