S60 3rd Edition devices in Landscape mode like it is available in some E-Series and the N93. tested this successful with Nokia N80. Here is what you have to do:
1. download the Trial Version of ImageExpo by SysOpen Digia
2. install it on your computer and then install the SIS file for the 3rd Edition on your device (the SIS file will be copied to your computer during the isntallation)
3. Start the desktop application Image Expo and the connect application on your device and simply connect via bluetooth or USB.
4. Go to "View" -> "Orientation" -> "Rotate Counter-Clockwise"
5. After restarting the phone the screen will be in normal mode again.
Now you can use the internet browser, and all other Nokia-applications in landscape mode. Even most other applications and some games like Snakes or Oval Racer are now in landscape mode