For those of you looking for a low-cost RSS aggregator for Outlook, check out
RSS Popper: . It's still in beta but works fairly well and automatically includes links to a few common places, such as BBC News, Microsoft Watch, Rolling Stone, etc. You can import from OPML as well as export your feeds into your own OPML file.
It works in a simliar fashion to NewsGator but the Outlook edition of Newsgator costs $ (not expensive but still $) whereas RSS popper is free. All of the feeds are put into a new folder in Outlook called RSS.
The post says it reads both RSS, Atom and RDF but most of the feeds I see are all RSS.