Here is a neat Utility to turn off you touchpad while typing

TouchFreeze is a great utility for a Windows based machine that will automatically turn off your touchpad while you are typing on you notebook/netbook. If you are like me, a person with gorilla hands, you probably inadvertently   brush up against your touchpad while typing. All of sudden your cursor is in a different location on your screen and you have just added a great thought to your document but it is in the wrong place! Now you have to fix this and in doing so you now have lost your train of thought.

TouchFreeze when activated, will sit in your system tray and simply turn off the touchpad when you start typing. It’s simple, free and is an open-source program that works with Windows 2000, Windows XP, Windows Vista, Windows Server 2003/2008, Windows Server 2008, and Windows 7.