Zeemap

I like your idea of inserting notes into a map rather than just a document, so I've created a zeemap and embedded it in the right-hand column. (Click on 'visit larger zeemap' to see a version at a more useful scale.) I'm not sure if I've got the settings right, so you might want to mess around with it for a bit and then let me know how you got on. (Zeemap have developed a great resource but they really need to sort out their 'help' material!)