I am a loyal fan of RSS Popper, which puts RSS feeds into Outlook. Well, looks like Microsoft is on going to go the same way.
From Michael Affronti’s blog (the program manager for Outlook):
RSS Aggregation in Outlook is aimed at providing the user with a consistent look, feel, and experience while interacting with RSS feeds and related information. While RSS can be a complex technology to interact with, Outlook will merge the complexities and cover it with our friendly user interface. From the beginning of interacting with a feed using the subscription process through managing your feeds, their associated folder hierarchies, and potentially sharing feeds with others, Outlook will cover RSS in those situations from end-to-end.
(Image from Michael Affronti’s blog)