I wanted to create a Facebook page for my wife's business that would automatically import and update from an existing Blogger account she uses.
It took a little while to get it straight, but it turns out to be very easy. Of course Facebook changes things so frequently that this method may not work an a years time, but it should get you on the right track.
First of all you need to create or have an existing Facebook page and Blogger Blog.
Click edit page from the page's profile
On the left side, choose apps and then under notes click "Go to App"
then on the left side of the screen you should see "edit import settings"
Then all you have to do is enter in the following URL, substituting 'blogname' with your blogs name.
for more info, and a video I found this link to be the most helpful