Mapping service based on Ning (http://www.ning.com/pivot "Ning is a free online service/playground for building and using social applications that enable anyone to match, transact, and communicate with other people.").
Projects that are 'map'-related in some way : http://www.ning.com/search?q=map&GO=Search For example see Bay Area Hiking Trails : http://bayareahikingtrails.ning.com/dispatcher.php?controller=welcome&action=show and http://restaurantreviewswithmaps.ning.com/subject.php?SubjectID=371878
Using Google Maps with Ning : http://developerdocumentation.ning.com/post.php?Post:slug=XNCServicesGoogleMaps

OpenStreetMap ( http://www.openstreetmap.org/wiki/index.php/Merchandise ) has put together all the GPS data it has in London and made a stunning poster from it. : http://www.openstreetmap.org/wiki/index.php/Image:Londonposter1.jpg " ...the thicker the lines, the more people travelled them."

Rich AJAX dicussion: http://www.ok-cancel.com/archives/article/2005/09/why-ajax-matters-now.html (in comments section below article).

Google Maps Marker Icons : http://home.carolina.rr.com/rodneyg/markers/gmarkers.htm for some icons you can download to use on your maps.

"Review of JPEG2000 and Geo-JP2 Compression Software" : http://magert.whoi.edu/baseline/pdf/24_3.pdf (starts on page 8/11) Good file format chart : http://memory.loc.gov/ammem/help/view.html#map for graphic/map files.

Jigsaw Puzzles Based on Maps : http://www.puzzlehistory.com/mappuz.htm

“We cannot walk through life on mountain peaks." - John Burroughs (1837-1921) American naturalist