Hi,
You did this ?
Opened iChat
Went to the iChat Menu > Preferences > Accounts and used the Plus button.
In here you chose Google in the drop down at the top item ?
You added your Google ID exactly as it appears when you login to the Web Mail page ? (it makes a difference between @gmail.com and @googlemail.com)
You have enable Talk on your Google Account ?
If you check now, the iChat Menu > Preferences > Accounts > Server settings tab for the Google account lists talk.google.com as the server and is using SSL and therefore port 5223 ?
You have added Google Buddies with the "right suffix" to their IDs in the list ?
10:31 PM Monday; January 23, 2012
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
iMac 2.5Ghz 5i 2011 (Lion 10.7.2)
G4/1GhzDual MDD (Leopard 10.5.8)
MacBookPro 2Gb (Snow Leopard 10.6.8)
Mac OS X (10.6.8),
"Limit the Logs to the Bits above Binary Images." No, Seriously