Today Google announced on the Official Google Mobile Blog that it is launching Google Talk with video and voice chat for Android phones.

Whether your Google Talk contacts are on any compatible Android tablet or phone, or happen to be using Gmail with Google Talk on their computer, you can now video or voice chat with them right from your Android phone. Calls can be made over a 3G or 4G data network (if your carrier supports it) or over Wi-Fi.

A video or voice chat button will appear next to your contacts In your Google Talk friends list, and to connect with them you just have to touch the corresponding button. If you need to check something else, the video will automatically pause, allowing you to go back to your phone’s home screen or another app. As an added bonus, any text chats from the person you’re talking with will be overlaid on your phone’s screen so you can read them without having to leave the video.

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Google plans to roll out Google Talk with video and voice chat gradually to Nexus S devices in the next few weeks as part of its Android 2.3.4 over-the-air update. The announcement states that It will launch on other Android 2.3+ devices “in the future”.

Google has put together a video to go along with today’s announcement, which we’ve embedded below.