Change Android Smartphone Google Talk Accounts
Android users with Google Talk stuck on their initial Google Account have been plagued with this problem since late 2009. Fast forward 2 and a half years later and the problem still persists, virtually untouched by any of the official Google app developers. While there isn’t a solid solution, this work-around will allow you to reset which Google Account your phone is synced to by default. On your Android Smartphone, go to Homescreen » Settings » Applications » Manage Applications...