Bugger, thought I fixed that. Will investigate, along with some information supplied to me by an FT member who did something similar about 4 years ago - and managed to get all the point to point distances from somewhere.
Great Circle mapper also has a new website, which would allow for a cleaner lookup for the miles eg: Great Circle Mapper
I've had a look at the various versions of the Spreadsheet and like the concept. Don't have any real feedback though.