You are asking very good questions but the best way to protect yourself is to request an opinion letter from an attorney who specializes in naming rights, copyright law, etc.
In the meantime, you can follow a simple rule when publishing anything. The truth will set your free but a lie will make you cry. If you are putting true information on your site in a way that is not deceptive then you are most probably safe, but again we advise to cover your bases and get that opinion letter.