CWmike writes "Police agencies worldwide are turning up the heat on a loosely organized group of WikiLeaks activists. After yesterday's news that UK police arrested five people, US authorities announced that more than 40 search warrants have been executed in the US in connection with last month's Web-based attacks against companies that had severed ties with WikiLeaks. Investigations are also ongoing in the Netherlands, Germany and France, the FBI said Thursday. Acting on information from German authorities, the FBI raided Dallas ISP Tailor Made Services last month, looking for evidence relating to one of the chat servers used by Anonymous. Another server was traced to Fremont, California's Hurricane Electric. On Thursday, a Web page used by Anonymous to coordinate this latest round of DDoS attacks was offline, and the group's Twitter and Blogspot pages were silent."
Reader Ajehals contributes a link to the UK Pirate Party's explanation of how the law applies to DDoS attacks