I've been following this for some time. I do not understand these delays except requiring porn sites to use a .XXX suffix would make porn easier to find and more importantly, easier to filter: “Delay on the XXX Domain”.
I just read “The End User: Adults only? Not so fast” on the International Herald Tribune. Seems ICANN is delaying the release of this suffix again.
TechDirt comments: “So, Wait, Is .xxx Good Or Bad For Kids?”