Now a Facebook Users can also subscribe to another Facebook users. There is a option in Facebook if you allow Subscriptions or you not. If you allow the subscriptions then you are done. Just click on the subscribe button and then you are allowed to choose what sort of subscriptions to be done. According to the type of subscriptions you are now notified on your news feed according to Facebook.
Facebook allows users right weather to allow subscribers to subscribe or not. If you are willing to get subscription button then this link will help you.
Subscribe Buttons look like ::
With the subscription you can let anyone to see your public updates according a blog post by Facebook.
After you got the subscription enabled you will got a new Facebook tab in your profile page named Subscription and subscriber.
So it will be good to use this feature of Facebook.