"quite amusing and drastically geeky at the same time"
I've added the approximate distance to the sea for every postcode. This is available on the individual postcode pages and as part of the CSV downloads
Probably only of use to me, but I've added a page that lets you find the shortest distance between a postcode and a straight line
Distance to a line (doogal.co.uk)
I've uploaded the latest ONS postcode data to my website. The data has passed my sanity tests, but let me know if you spot anything amiss. The CSV downloads now include a UPRNs column, which is a comma separated list of the UPRNs in the postcode