The guys at 37signals not only have an eye for details, but also an ear for their customers. Only 36 hours after launching their web-based CRM tool Highrise, they announced changing their usage plans in response to customer feedback.
For example, there's now a "Solo" plan for lone warriors that need lots of the features of the "Plus" plan, but no additional user accounts. And every plan had its storage space increased.
It's so easy to conquer your market. Just switch from "Know your enemy" to "Listen to your customer".