Google Maps Navigation, a free navigation GPS device for Android devices is now available in 11 more countries. Besides for the U.S. it is available in Austria, Belgium, Canada, Denmark, France, Germany, Italy, the Netherlands, Portugal, Spain, and Switzerland.
The requirements are that you are running Android OS 1.6 and have an internet plan for your device.
You can learn more about it over at google.com/mobile/navigation/.
Tom from Google Maps team posted a forum thread about it over at the Google Mobile Help forums. Tom said:
Forum discussion at Google Mobile Help & Google Blogoscoped Forums.