Ever since Geoblogger went down, I was looking for something similar. I found Flagr, a site you can use to put flags on a Google map. The brilliant thing is, you can then link those flags with your photos on Flickr. Simply add a Flagr icon in the photo's comments and the visitors can see where you took the photo. More info about all that in the Flagr::Sharewhere! group on Flickr.
Here's an exemple of a clickable Flagr icon: