Always make the good points Rose
One more time and I'm done harping -- child pornography is a FEDERAL crime, investigated and prosecuted by the FBI and US Customs (sometimes in conjunction with other countries) -- production of, possession of, distribution of child pornography are federal issues and they will be heading up the team that comes to the house to get you if you are caught doing it.
Obscenity, which is where porn is covered under state and local laws is NOT a federal matter, the feds don't deal with it currently. The Miller Test is the applicable standard for it, and it varies wildly from one community to the next as to what would be considered obscene.
Currently there is at least one case involving a web site where the defense is contending that the prosecution has NO jurisdiction and NO reason to prosecute based simply on the prosecutors being able to view the website in their locality. Whether this holds up or not as a defense will be an interesting and very important point for all web site owners since once a precedent is set, most courts will not overturn it unless it's in appeals courts.
If you want to do as much to protect yourself as you can with your sites, go to the store and buy a copy of Playboy -- (if they don't allow Playboy sales where you live this could mean you best talk to a lawyer you trust about it all right fast) and see what's in there. If you've got stuff on your tours and in your galleries and you are worried about prosecution, use that as a guideline for what you post