Geotagging comes in many flavours. First, let’s take a look at Tagzania, a web site where you can add keywords to specific geographic locations, and track that keyword via RSS. I’m not sure how scalable this concept is; imagine the chaos if every bar and lake on the planet are tagged. Via Google Maps Mania. Been Mapped is similar, but uses annotations rather than tags: users label points, and other users can comment on them. A neat concept. Firefox or IE only; it blows up Safari. (Both of these services use Google Maps.) And finally, MAKE: Blog has another geotagging tutorial (see previous entry) — this one on how to geotag your del.icio.us bookmarks and have them show up in Google Earth.