Lookie!
How to update your Facebook status via G+ without any extension

1. Login to Facebook.
2. Go to http://facebook.com/mobile
3. Copy your unique e-mail adress.
4. Go to Circles on Google+
5. Add the facebook e-mail address to a new circle (Mine is called "Update Facebook")
6. When you want to post to Facebook just include the circle.

Notes:
Photos don't get uploaded to Facebook
Links seem to be parsed ok but thumbnails are not created

Hope this helps.

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