There are two main ways of using Facebook as a Business Marketing Strategy.
The most common way is to create a Facebook page for your business. Then using this page articles, features and news are pushed to your “fans”. Feel free to follow our Facebook Fan Page.
The second most common way is to become friends with your customers. This works well if you the main face of your business – but does have the problem of making sure you mange to professionally represent yourself. Drunken pictures from your Spanish holiday might be okay for your family and some clients, but not necessarily all.
A much less used approached is to create a Facebook Application. Obviously this is more tricky and would probably need professional help but a good “viral” application can spread your name to millions of users.
There is documentation to start the process of creating an application that you can read if you are feeling brave.
The main reason for using Facebook of course is to push traffic to your own site – whichever method you choose to use you should make sure that you measure it to make sure it is being effective.