Just click on one marker and you get the links to the respective blog posts. Not all blog posts are in there, just the ones where I could associate a location with. And, these are only the places I wrote a blog entry about :P
I probably put more effort into this than I could have. After all, with Google Maps > My maps, one can conveniently create own maps with own markers, lines etc. I chose to do it the "proper" way and use the Google Maps API to have it a bit more flexible for me.