Charlie Wood has a great example of enterprise RSS up and running in his Spanning Salesforce application. He’s gotten good buzz around it, even without putting out a press release. Consider it an early example of combining RSS with an API to get data enterprise data from a hosted application via RSS.
Simultaneously, Ryan Martens pointed me at the new Salesforce.com CRMSuccess.com blog . Built on top of Typepad with the feed by FeedBurner , this is an outstanding example of an enterprise blog that highlights a specific application (in this case – Salesforce.com) as well as “best practices” for this application (in this case – CRM).