In addition to using applications which use the build-in accelerometer on the HTC Touch HD (like GSen, GNes, Flip-It, Gyrator and so on), there is another way to getting landscape keyboard on the Blackstone, which doesn’t involve any other application install.

First thing you need to do is find a way to control your screen orientation. Accelerometer enabled devices have the orientation tab hidden from the Screen settings, so if this is your case, you can unhide them with Advanced Configuration Tool or you can read Adam’s take on re-enabling orientation settings.

Here’s a simple way to control orientation. You need to go to Start, Settings, Personal, Buttons and change the preconfigured action of the Answer Key to “Rotate Screen”. This way your screen will rotate when you tap and hold the green button. From this point on, it’s very simple. Hold the button whenever you want to go landscape, let it be Excel, Word or any other app (except Opera, which will use auto orientation) and the keyboard will follow orientation.