I have a question for you. I'm convinced that a successful adoption of weblogs in the enterprise goes through the internal adoption of the couple news feeds and newsreaders/aggregators. But I found one major issue with disseminating internal content through RSS/Atom feeds: how do you secure the feeds?
Using an online aggregator through a web browser seems the easiest way, since every company already has its own way to secure web access to its intranet. However I tend to prefer desktop aggregators, but they don't necessarily implement things such as SSL/https and cookies which are commonly used in such cases.
Have you got secured news feeds on your intranet, and how are they implemented (security, authentication, compatible newsreaders/aggregators)?