Just had a post on the UKonline forum asking the same thing .
So by that simple fact its safe to say its not the ISP that's blocking it and it was probably a transit link dropping temporarily or the hosting having a blip or a DNS issue .
there are so many links in the chain that bring you a web site i feel blaming blocking should be the last in that list , not the first
Edit: totally agree with your post
Edited by deleted (Sat 26-Jun-10 01:35:01)