back to the map, go to the blog
You, author of photos, need to agree the follow terms before registering your RSS for your photos.
Input URL of a RSS of your photo blog site that you want to show on MapPIN'on OSM if you agree the above. Here is policy of MapPIN'on OSM which is not required to be agreed.
If you are flickr user, registering "flickr:" URI is better than RSS.