When I make a query via http://ws.geonames.org/findNearbyWikipedia? I can restrict the search to certain countries, so I assume that the country information for a Wikipedia entry is available. Would it be possible to add the country of the entry to the XML returned by the query? (I'm guessing state/province is out of the question)
The country parameter for this service is refering to the postal code and not to the wikipedia article. If you ask for a postal code / country combination at the border of a neighbouring country then the service will return articles from both countries.
We plan to add the country information to the wikipedia articles with the next load. We will reverse geocode all articles in order to do so.