The current moves by the UK government to deport foreign nationals to countries where they may be tortured can be seen as part of a wider global problem. HRW have published extensively on renditions and diplomatic assurances and their reseach in this area can be found at the link below.
The ACLU maintains a useful database of documents about international detainee torture and abuse by the US goverment. They are also running an ongoing legal campaign to ensure that the government cannot use the Freedom of Information Act (FOIA) to withhold records of detainee abuse at Abu Ghraib prison in Iraq.
The ACLU and Human Rights First have also charged that Defense Secretary Donald Rumsfeld bears direct responsibility for the torture and abuse of detainees, and filed a lawsuit in federal court on behalf of eight men subjected to torture and abuse under Secretary Rumsfeld’s command.