Google Android 2.3.4 includes one major update for the Google Nexus One: a new version of Google Talk which includes voice and video chat capabilities. But if you have any phone running Android 2.3 and up you can now install the latest version of Google Talk without waiting for Google to push the update.
That’s because xda-developers forum member britoso has grabbed the file from Android 2.3.4 and posted it for anyone to download.
There is a catch though. You can’t just install Google Talk 1.3 the same way you would any other Android app. First you need to uninstall the earlier version of Google Talk and then push the new version to your phone using the Android Software Developer Kit. Your phone also needs to be rooted.
If you have root access and have used the ADB tool in the Android SDK before, the process should be pretty simple. If not, you can read up on how to use ADB at the Android developers page. In order to root a phone running latest versions of Google Android, you can use the recently released GingerBreak tool.
You can find instructions for installing Google Talk 1.3 at the xda-developers forum.