5 New European Google Maps Mashups

The Netherlands: Crime Map - Mashes up a database of more than 20,000 crimes for the country
Germany: Potsdam Google Map - This is a great Google Map that lets you explore the city of Potsdam, Germany (web page is in English)
Germany: Bloggers - A Google Map of some German bloggers. Check here for more information
Switzerland: Blog Map - Mapping the Swiss blog scene
Belgium: Holiday Home Rentals - Click "Search on map" to view the map. It also includes interesting links.