The Surname Profiler Project Website. A recent research project based at University College London (UCL) has investigated the distribution of surnames in Great Britain, both current and historic, in order to understand patterns of regional economic development, population movement and cultural identity. Start a search here.
Today, the National Archive made over 5 million records of World War I Medal Cards available online. Search for an ancestor, or an historical name. As an example, here's Winston Churchill's record [pdf]. It costs £3.50 to download an image such as this, but the search function is thorough. I tracked down a relative from a general search of my surname.