telnet federation.google.com 5269

The server-to-server port of the google.com domain is now open via XMPP. You should be able to talk to all your friends working at Google.

Gmail server is still not open. If we assume that they are using the same code at google.com and gmail.com, it should be safe to assume that this is a external interop test, to prepare the full opening.

Cool.

Update: thanks to Rusty Shackleford (see his comment below) for pointing out that GTalk is now open.

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