is an "unofficial" IE7 add-on developed by Nate Furtwangler and Chrix Finne, both of whom interned with the IE RSS Team. The Feeds Plus add-on they created during this time brings aggregation and notification to your IE7 feed reading experience. With Feeds Plus, feeds can be grouped within a folder and read as an aggregated feed, and this feed can be searched, sorted, and filtered just like you can with non-aggregated feeds.
A second feature is a pop-up feed notification reminiscent of Outlook’s. You can decide which feeds matter most to you and then be notified with this pop-up as soon as those feeds have new items waiting. The pop-up is unobtrusive - it fades in and out - and it includes a handy link to the feeds that it’s announcing. For more info on Feed Plus check out this blog post at the Microsoft RSS blog
. You can get the Feed Plus add-on here