For those of you who have the geotagging data, latitude and longitude, in your photo's EXIF, and wonder why they don't show up on your flickr geotag map, you should check out this link:

http://www.flickr.com/account/geo/exif

It seems to be a "hidden" setting that tells flickr to automagically read your EXIF data and place the tagged pictures on the map. Unfortunately, it does that only upon upload/replace. Your old photos will not be moved to the map :-/