Used to use a Chrome extension to cross post between G+ and FB. However, they stopped working, so I had to figure another way out....
Thanks to Google search, it wasn't too hard, but documenting it anyway, for friends and family....
1. Find out the email address that FB allows you to use to post status updates via email. I found that info that from this URL/query:
https://www.facebook.com/help/?faq=210153612350847#What-is-my-personal-publishing-address?
2. Add this email address to your G+ circles as a dummy user (I chose a user name like "Me on Facebook". Create a circle that only contains that user
3. When you post on G+, add that circle to the set of people the post goes to.....
Update (12/4/12): This doesn't work anymore :-(. And even when it did, it stripped out all HTML links.