My FanPage for my business is linked to my personal page. This allows me to decide whether or not I want posts on my FanPage to appear on my personal page. I usually opt to share all comments and status updates to my regular Facebook Page. I have actually received some new fans this way. Friends will comment or like Business statuses. I have had some of their friends see this and want to learn more about my business.
I think if you do use your personal page to help grow with your business, you have to keep that semi-professional as well. I never post anything that could be embarrassing (Such as those I see posting their drinking poses) and I always use good language on my page.