It's almost too easy!
Just pick it up, push to talk, and speak your status updates. Your statuses are automatically transcribed and posted to Facebook, Twitter, or both.
The push-to-talk button on the front of the Lighthouse is context-sensitive. If you're looking at a friend's wall, push-to-talk to post to that friend's wall. Looking at your own profile? Push-to-talk to update your status. If you're on the home page, you can push-to-talk to update all of your statuses at once.