facebook upcoming ipo

I wonder if there are any benefits or negatives to facebook fans, hotcopper would have an abundance of them, when she goes public.
More importantly how beneficial to advertisers, brokers,
multi-national and BIG concerns over this ipo.
To have a large holding and or voting rights or maybe executive representation in facebook post ipo could alter the whole facebook page.
Once a member all your details and posts are stored, even after cancelling your membership, a major concern