How to Tweet from iPhone to Facebook and Live Profile

Twitter is now deeply integrated with iOS 5, enabled tweeting from native applications like Photos, Camera, YouTube, Maps, and Safari.

But how can you tweet from iPhone to Facebook and Live Profile?

To post your tweets to Facebook
go to https://apps.facebook.com/twitter/ to connect your Twitter account with Facebook

To connect Facebook to Windows Live Profile
go to https://profile.live.com/ and click on manage or connect Services