Before IE7 and Office 2007 Beta 2 I used Attensa to bring RSS Feeds into Outlook, I liked the product and I'm still on their mailing list, they just sent me a link to their white paper "Enterprise RSS: the center of attention" and it's useful reading for anyone asking what RSS means for internal information, and the management of information overload.
Their blog links to a report on RSS by Jupiter Research which says
With support in IE7 for RSS feed discovery and retrieval, Outlook 2007's ability to be a great reader for those feeds, and Sharepoint 2007's ability to make any list an RSS feed, implementing RSS solutions is going to be both cheap and easy for a lot of customers. I predict now that as RSS becomes more widely available users will begin making demands for RSS couched in terms like:
All solved by RSS.