Dated, but useful...

From marketingsherpa, February 2004. Excerpts:

RSS is about to hit the mainstream. In fact, companies such as Amazon, Walt Disney, and Macromedia are already testing RSS to distribute news and info to customers and business partners.

...big companies are starting to use RSS in two ways: to improve in-house communications and to send out marketing and public-relations information previously relegated to email newsletters and news releases.

...The person who runs your company's intranet will probably benefit sooner from RSS than you will. More companies use RSS to manage internal communications and keep remote employees such as salespeople and field-office personnel in the loop without drowning in irrelevant information.

Technology companies such as Macromedia, maker of Shockwave, Flash and Dreamweaver programs for Web programming, use RSS feeds to pass on software beta versions and product updates and changes.