nicely hit the nail on the head. "Fan" pages are different from "friend" pages. Fan pages are designed for businesses, organizations, bands, groups, celebrities, ect. They don't have the same access to your info your friends do.
Like it or not, Facebook and Twitter are the future (and now). Society changes, and we are in the midst of a revolution.
Businesses can benefit from being on Facebook. Seeing all of your friends "like" the same page does a hell of a lot more for the ol' fashioned "band wagon" approach than having strangers read off a teleprompter on a TV ad.
You can also broadcast promotions and advertisements free of charge to your followers.
If you don't have a Facebook, I suggest you try it. Although it's highly addictive, I was able to connect with so many people that I hadn't talked to for decades. Old friends from my high school, coworkers from past jobs, frat brothers from college...
Although it was sort of creepy when I first signed up (Facebook correctly "suggested" close to fifty people that I actually knew by only having my name, e-mail, DOB, and city), I was addicted. Within my first week, I had reconnected with close to 200 people, and was "tagged" in old pictures from back in the day. The whole experience was magical.