See more InfoPath demos at http://office.microsoft.com/en-us/help/FX100485311033.aspx
Many businesses rely on standardized forms for gathering information, and often those forms are created in Microsoft Office Word. But Word isn't really intended for creating, maintaining, and filling out forms — that's what Microsoft Office InfoPath is for! So what do you do when you're already using Word documents as forms? You probably don't want to spend time recreating them from scratch, even to gain the advantages of InfoPath.