"Just received an update that IBM's CIO's office is testing out RSS for internal communications. At this moment we have 3 feeds up and running on the IBM intranet. [...] The intranet is the first source IBM'ers turn to when they are looking for information and contains our profile, our contact details, personalised data according to profession etc... With these 3 RSS feeds we're certainly going in the right direction."
There's your business value right there - automated information flow instead of haphazard emails. Does it work for everything? Of course not. Is it well suited to a large amount of internal communication? You bet.