Hi Suzanne & Avocet,
Yes, there is a solution where you can keep the two entirely separate. If you go to the bottom of your facebook profile page and click on the teeny tiny print that says "Advertising" this will allow you to click on "Create Facebook Page" for your business. A "page" is different than your "profile". Anyone can become a fan of your page without asking your permission whereas with your profile someone has to request to become your "friend."
By creating a fan page then you can do updates for your business and post links for your business and those will go out to your "fans"-i.e. the people who have joined your fan page. This updates separately from your personal profile page. When you go to set up your fan page though make sure you try to categorize it under services and not "other business" as that will give you the most options for providing info about your business. You cannot change the category once you choose it.
Here is a link to
Mari Smith's site (the facebook for business guru) where she has a video introducing facebook PAGES and then if you scroll further down the page she walks through the process of how to set up a page as well as ideas for how to promote your page and what applications you can add.
You can also check out my facebook business page
HERE. It's still a work in progress...
Hope this helps.