The lesson, I had to learn again:
Be cautious with fake /etc/hosts entry, even if they make sense temporarily!
Category: Google Talk
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my GTalk / Adium / Lion problem is gone, and I was the problem
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logging in into mail.google.com from behind a firewall seems to hang
It appears to me, the Google Mail Talk Gadget phones home, and if its port is filtered by the firewall, you are going to wait for ages.