Blocked By Etisalat!
May I take this opportunity to extend my most humble apologies to Etisalat and, indeed, to the brave and noble population of the UAE for having offended their religious, cultural, political and moral values. And it only took two innocent little words to do it!
So I removed the offending words from the post, and instantly the page is available again. Which means that Etisalat have an extremely crude set of filters that look for banned words in page titles. Think I'll try a few experiments...
...a bit later. Right then, if your page title contains the phrase 'free hot', it triggers the 'site blocked' page. How chuffing pathetic is that?