Summarise???
The quick summary is it is a foul law which does not do any more towards the original purpose of protecting children as in version 1. Some call that utter hypocracy, made worse by the fact that the DOJ are using children as an excuse to attack the adult biz, when they have never enforced the 90's version ever.
It does.. and this will probably be the subject of several court cases... place models in awkward situations when their home address are leaked over the net.
It does create an unusual volume of record keeping, considering records have to be kept of blonde MILFS with protruding fronts and aged 40 or more - just to establish they are over 18.
From a legal standpoint.. it's hard to discuss, simply because all detail needs read and even then, the govt would expect people to take legal advice from lawyers who have little clue themselves.
For US webmasters - they have just been told to hit the dirt. The next stage is the handcuffing.
For foreign webmasters, well.. they still live in a free world and will flourish in the short term - before some other govt starts playing games.