I agree that it would be a better thing to work on a technical solution to connect the wiki and Wordpress but I don't think it is the point of this "little" project for the moment. @alabaeye, what do you think ?
BTW, I can't really help on this point. Maybe I can look for the API of Semeoz Worpress (I was told that WP has a native API now), but I don't know how to use it as I'm not a developper.
About the thumbnails, I also agree it would be great to develop a dynamic solution but I'm not sure it's possible to center the thumbnails on the maps when there are embebed in a website. When it's an OSM map or a google map, it's easy; but sometimes the maps are inside a site, sometimes very low on the page. Having thumbnails of the entire website wouldn't be nice...
Anymay, if nobody tell me not to do, I can start with reviewing the maps of the wiki and make a list of the links that are not really maps... At least it can be useful