Have you thought about creating a Profile Badge in Facebook that loyal fans can include in their signatures on other forums and blogs? I created one below, but I could only include the picture link, unfortunately, because these forums limit the amount of HTML code that can be included in a signature. A fully functioning badge includes links to Facebook, website, and e-mail address.
I'm thinking that you could make a badge and upload the code someplace that fans could copy and include in their signatures and such. You probably should make it as simple as possible and still get the job done.
Here are two sources that talk about Facebook Profile Badges:
Hilfebereich | Facebook
How to Create A Badge Of Your Facebook | eHow.com
Edit: I moved the image to within this post because I did not want it in my signature on these boards:
