For all Facebookers who have a 'Fan page' or 'Facebook Page' you can now invite people to 'Be a Fan' straight from your site/blog via a widget:
I've added mine to this blog, it's on the right sidebar, it does take a while to load so I've decided to just include fans without the stream. Or you can exclude both and just have a linking button.
For those who wants to create a Facebook page, sign into your Facebook account and visit any page you come across. Scroll to the bottom. You will see a 'Create a page for my business' link on the left sidebar. It's tiny but it's there! A facebook page is useful for sending updates to your fans, and includes albums which you can share to non-facebook audiences.