We know that Google really, really, REALLY wants you to use Hangouts rather than Talk. And we also know that many of you are less than enthusiastic about being switched to Hangouts, for various reasons. Well, it turns out that it may be possible to get Google Talk back. We don’t guarantee this will work, nor that if it does work, it will work forever. But we can at least give you the links that might give you what you actually want, rather than what the Google Overlords would force you to take:
How to get rid of the new Hangout app and revert back to Talk on your Android Phone (for the good, that is!) (Plugged In)
I dont like Hangouts, anyone have the latest Google Talk apk (XDA Developers)