I did read the article using Google's cache, what peeked my curiosity was the cause of the unavailability.
So from the rest of the comments the access seems to be patchy, and it appears to be an IP-based block since from a single point it is either always accessible or not at all (not time or load dependant, I mean), probably their firewall is blocking by IP ranges based on previous intrusions or threats, or a similar criteria.
Anyways, Google cache was the option for those of us who could not access it directly and, although no images are shown in the cached version, the article was worth reading.