TechWhirl (TECHWR-L) is a resource for technical writing and technical communications professionals of all experience levels and in all industries to share their experiences and acquire information.
For two decades, technical communicators have turned to TechWhirl to ask and answer questions about the always-changing world of technical communications, such as tools, skills, career paths, methodologies, and emerging industries. The TechWhirl Archives and magazine, created for, by and about technical writers, offer a wealth of knowledge to everyone with an interest in any aspect of technical communications.
Download the Emerging Digital Economy doc for a general overview. Some
of the figures are out of date, but its a good start.
Also, some recent books on the subject worth looking at include:
* Enterprise.com by Jeff Papows, (CEO of Louts - a big part of
IBM's E-Commerce efforts have gone through them),
* The Search for Digital Excellence by Ware, Gebaur et al (an
excellent overview of the entire subject by UC Berkley Business School
* Customers.com by Patricia Seybold (haven't had a chance to read
it yet, but it looks promising).