Michael Affronti, Program Manager for Microsoft Office Outlook, is working on RSS, Instant Search, and Sharing technologies for Outlook. Recently in his blog search.subscribe.share he talks about integrating RSS feed aggregation inside a future version of Outlook. See his two posts:
RSS Aggregation – Part 1: The Partnership (Dec. 22/05)
RSS Aggregation – Part 2: Our Implementation (Jan. 3/05)
Could this be the application that will bring RSS and feed reading over into the mainstream? Providing it is kept elegant and simple, I think it might be. Looks like he takes comments over at his blog, so head over and give him some feedback!
I don't recall exactly where I first heard about this, although Sabrini Pacifici reported on this initially in her blog beSpacific.