After I got a Nexus One from Android Developer Lab in Hong Kong, eventually I switched to Android from iPhone platform.
In my setting, GTalk on my N1 is automatically signed on. It shows I am away when my N1 is idle. I always switch on pidgin IM on my Ubuntu at work/home, which Android and Ubuntu signed on GTalk simultaneously. But I found that GTalk on Android rule my status even my pidgin states I am online, friends on GTalk found that I was away.
Just google for this problem again, and finally I got a solution. XMPP priority plugin on Pidgin can reconfig the priority of online status from Pidgin. Now, I set it to 100 and successfully defend the ruling of my Android’s GTalk.