Anyone wondering who still uses Foursquare should read this article over on The Next Web. Foursquare has released a map of the last three months of Foursquare checkins - that's 500 million of them. Check out the map, which lets you zoom in and out and find your city in a search box.
What I find interesting in Europe is thevolume and the location of the checkins. Like the story in TNW says, this is a real-world version of Google Pagerank.