Short form of DuckDuckGo site has been blocked in the UK, at least by EE and Virgin Media ISPs (two different sources).
"We have been ordered by the High Court to prevent access to this website as it operates unlawfully. This is a legal obligation that we must comply with. The Court has found that the site and its users infringe copyright material in the UK.
EE does not monitor customer's activities [sic] nor will we disclose personal details or any information about our customers to any third party unless legally compelled to do so."
Of course it does raise the much more important issue of how easy it is for entire websites to be accidentally black listed.
Luckily they don't seem to be smart enough to block the IPs, just one (of DDG's many) domain names.