Business Use Cases are often discussed but rarely defined clearly. This article poses a suggested definition and discusses how these requirements components differ from traditional business processes.
Here is the free Chapter 5 download from Robert Hoekman Jr.'s book - Designing the Obvious which is available from his website. This chapter covers "turning beginners into intermediates, immediately".
This essay on prototyping is Chapter 10 in a book edited by Terry Winograd from Stanford's HCI Group and d.school. While the book and essay were published in 1996, the ideas presented are quite relevant in today's user-centered design world.
Many IT organizations have a tough time aligning their service offerings with the businesses that they serve. The answer to this problem is product management, a discipline that has been used in software and internet development with great success.
Read this article "Achieving Customer Delight - The Kano Model Influence" as we continue in understanding the details of requirements and how to articulate them from BA's point of view.
In this article from Boxes and Arrows, Milissa Tarquini (Director, User Interface Design and Information Architecture at AOL) discusses the myth about the importance of being above the fold or in the scroll-line.