Last year a project was begun to link Wikipedia to Google Earth. At the time there were only a few thousand articles with georeferenced information, so it seemed rather sparse. But, now hundreds of thousands of articles are georeferenced in the Wikipedia. The project started last year now not only has 350,000+ articles available, but they also allow you to switch to one of 11 languages and you get placemarks for articles in that specific language. They also have selected different icons for different categories of articles to give placemarks some context. Here is the network link for Wikipedia . To change the language you edit the properties of the network link and change the two-letter language code as described in the instructions. The project was posted to the GEC by ‘kolossos’ (one of the project leaders), and thankfully they posted an update on its status which brought it to my attention.
There have been a number of efforts linking the powerful multilingual resource of the Wikipedia to Google Earth. Most recently, Google released a layer under the new Geographic Web layer which shows Wikipedia placemarks and the descriptions show a nice part of the summary and photos from the Wikipedia page. Also, one of my favorite network links for GE is to the Wikimapia project (primarily used with Google Maps, but you can see the data in GE). I like the Wikimapia version because the rectangles outlining an object in the aerial photos give some visual context to the object being described. But, I think all three of these methods of viewing Wikipedia data are valuable.