TechCrunch reports on a secret meeting that happened at Google in the last few days. It looks like Google is about to “out open” Facebook by allowing developers to leverage Google’s social graph information.

The short version: Google will announce a new set of APIs on November 5 that will allow developers to leverage Google’s social graph data. They’ll start with Orkut and iGoogle (Google’s personalized home page), and expand from there to include Gmail, Google Talk and other Google services over time.

On November 5 we’ll likely see third party iGoogle gadgets that leverage Orkut’s social graph information – the most basic implementation of what Google is planning. From there we may see a lot more – such as the ability to pull Orkut data outside of Google and into third party applications via the APIs. And Google is also considering allowing third parties to join the party at the other end of the platform – meaning other social networks (think Bebo, Friendster, Twitter, Digg and thousands of others) to give access to their user data to developers through those same APIs.

And that is a potentially killer strategy. Facebook has a platform to allow third parties to build applications on Facebook itself. But what Google may be planning is significantly more open – allowing third parties to both push and pull data, into and out of Google and non-Google applications.

That big rumor comes on the heels of another big announcement from Six Apart about open sourcing the Web’s social graph (a la OpenID). If you thought the Web was fragmented, wait until you can start building application on top of Google, Yahoo or MSN’s social graphs…