Recent reports on Twitter (and Herdict) indicate that ISPs in the UK and Germany might be blocking the English-language site of Hamas-affiliated Palestinian Information Center.  Some users, when visiting the site, have reported timeouts:

A report from blogger Prosebeforehos indicates that US ISPs Comcast and Verizon have blocked the DNS entry for the site, however, commenter JMCesteves explains:

It seems just a problem of (now) lame DNS delegation (but I don’t know if any changes have been motivated by something else previously):
DNS service for the domain palestine-info.co.uk is delegated to ns1.palestine-info.com and ns2.palestine-info.com and from whois for palestine-info.com one can see these were supposed to be 62.149.0.82 & 62.149.0.196. The second one is not replying, and the first one doesn’t know those ‘ns1′ and ‘ns2′ names, although from it one can see that the only name server with authority for palestine-info.com is now supposed to be ns.palestine-info.com=62.149.0.82 and the one for palestine-info.co.uk is now supposed to be ns.palestine-info.co.uk=62.149.0.119. Meanwhile, previous identical results for the address of http://www.palestine-info.co.uk (also 62.149.0.119) may be cached in some name servers, explaining why some people can easily access the web while others can’t.