For those of you who haven't seen this fantastic 'toy' its a great thing to play with see - article-gems link page to see what I mean - and its totally free. its also at article-gems blog which loads a bit quicker. What I really love about playing with the map is you can really zoom in on cities. You can see the pyramids, the NY trade center site, etc, etc. Google maps of course are another great option but I don't know if you can link your site visitors.