Though not orienteering maps, I just came across an amazing website of 'cartograms' - distorted world maps for depicting data. Thanks to Univ. of Sheffield and Michigan. Even the code is available via the site. Enjoy! Be sure to run one of the animations.
http://www.worldmapper.org/index.html
Sure are a lot of old Japanese folks. Fish, rice, and tea really do the trick, I guess.