Seriously...speaking with my parent hat on;
http://news.com.com/Bush+administration+objects+to+.xxx+domains/2100-1028_3-5833764.html?tag=nefd.top
The conservative right seems diametrically opposed to porn and that's all fine and good and ALL THE MORE REASON TO SUPPORT AND MANDATE THIS TOP LEVEL DOMAIN.
If all porn sites were required to use the .xxx instead of any .com, .org, .net or whatever then it would be insanely easier to block it from your kids view on your home networks. Blocking a top level domain is infinitely easier than blocking singular websites. If the US alone had this restriction even then good US based porn business would use it even including the $60 registration fee ($60 is a drop in the bucket).
It is silly to oppose this and they essentially shoot themselves in the foot in doing so.
Still a parent is faced with off shore sites but a simple US regulation would at least make things better for parents here in the states.