As with various other things Muir Grey has driven, http://www.rightcare.nhs.uk/atlas/ an atlas of healthcare variations, is a good idea.
Kingsley Amis long ago wrote as a critic a book about Science Fiction, called “New Maps of Hell”. I don’t think that was as useful or will remain useful for so long, although it had its amusing or interesting parts.
Whether the NHS can keep it together to keep this running, and in the same place, is another matter and a recurrent one.
Much better locations for it would be http://rightcare.nhs.uk/atlas/ and http://nhs.uk/rightcare/atlas/ but these things tend to be decided by people whose map of the Web is defective, and who regard that as one of their many strengths in management.