Give it a try at HTML5 Geolocation demo page.
With the Geolocation Provider Opera Unite app, you can easily spoof your location. Note: The app is still of alpha quality though.
Here is what you need to do:
- Install and start the Geolocation Provider Opera Unite app
- Setup your latitude, longitude, altitude etc. and save the configuration
- Now configure Opera to use your Opera Unite Geolocation URL (find it in the app)
- Try the HTML5 Geolocation demo page now to see your spoofed location.
Here's me blogging this from Antarctica.
Note: Your IP address is not spoofed. That can still be used to determine your location.