It has been possible to update your Facebook Status from Twitter using the official twitter application on Facebook. But if you don’t want your friends to go crazy and comment on every tweet you publish, there is another Facebook application – Selective Twitter.
Here is what you do in 4 easy steps:
Step 1: (Optional) If you have Twitter application already installed on your Facebook profile – remove or disable it
Step 2: Search and install Selective Twitter Application

Step 3: Authorize this application and provide your twitter username
Step 4: Go to Twitter and post a tweet. If you want to update your Facebook Status with a tweet – end it with #fb
And YES – the application removes “#fb” before updating Facebook status.