The map we use is called ClustrMaps and we also use Site meter. To add the world map you can get your own clustr map (click the links for teachers on the left of my class blog page - link at the bottom of this email). Then copy and paste the html code into the bottom of your 'about the blogger' box. It usually takes about 48 hours to go 'live'.

http://del.icio.us/koobi/blog is a link to some things blogging.