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If you own a Windows Mobile Standard device you might want to check it out.
Theres more differences between Windows Mobile Standard and Professional than the touch capability of the screen. Application security is one of the major differences. When you install software on Professional based devices, the most you are asked is if you trust this unsigned application. If you say yes, then that application has full access to the device and any APIs that it would like to interact with. Thats not the case with Windows Mobile Standard based devices.
To read the two article he has posted follow the links below:
Understanding application lock on Windows Mobile Standard deviceswmlock110
and
Removing application lock on Windows Mobile Standard Devices.