One thing that might frustrate you about the BlackBerry Storm is that you have no control over when the screen rotates from landscape to portrait and vice versa. Although you can try to keep your device still and stop it from rotating, it will almost always rotate by accident. Storm Rotation Wizard from Mobireport addresses this issue.
Storm Rotation Wizard costs $2.99 and allows you to lock the Storm’s display in portrait or landscape, or you can choose to leave it on auto-rotate, the default setting. This is the cheapest app out there to get this sort of control.