How do you think iPad owners use those fully-functional, take-anywhere devices? The answer might not only surprise you, but also convince you that if you're not putting key resources into developing iPad-friendly content, especially apps, you're making a serious business mistake.The biggest use for the iPad, according to results of a usage survey released this week by Business Insider: searching the Web, which takes 37.5% of users' time on the device. This is about equal to the amount of time sp...