Can you do maps and coordinates ?

Dear reader. For a small community website we would like to integrate a feature, as seen on [login to view URL] where we can display users name and picture + their city name when they login into our system. The map should only be for Denmark, - where we got all postcodes and city names. So we someone who have worked with maps before, and who can help making sure that lattitude and longitude will display the correct position on the map, accoring to our postcodes. We do not want to invite anyone who had not done anything similar before to work on this project. Therefore you will need to send references when you reply on this project. If not, do not expect answer. We look forward to hear from skilled people who can make this possible as soon as possible. Regards,