I was asked to create a facebook page for one of my best clients. I assumed I would need their log in and didn’t feel comfortable with that. When he told me the web hosting organization would do it and maintain it for a fee I looked in to it. It looks like you can create the page and then assign someone to build and maintain it. Sounds like another hat for ScotStyle. Rather than recreate the wheel I will link to a mashable article that takes you through the process.
Section 8 in the article tells you how to set up an admin to administer the page.