Isn't that amazing, how patient and how stoic are many users of this site! :!: Partly, because it is not practical to transfer so many images and the countless comments to another place. Partly, because PBase has indeed a simple and timeless design aimed toward presenting photography and a narrative.
Yes, it works if you drag the marker to the spot. And it will tell you what lat & long that is. But it won't allow you to tag by entering lat & long. And you can't look at the geotags unless you are logged in: otherwise clicking on "view map" just shows a world map. Wait another 3 years?