This is great news. Google has been one of the driving forces behind Jingle, but as they were implementing it far in advance of being standardised, the drafts/standards have since changed. Other implementations have to maintain support for several close but not quite the same dialects. Google updating their software will make interop much easier.
I've been somewhat critical of Google's attempts in this direction (http://senko.net/en/gmail-videochat-the-good-the-bad-and-the...), and I'm very glad to see I was wrong :)