This is not good news. I've been using the new beta MSN live "toolbar", based on Onfolio's products. Microsoft acquired them recently. The "toolbar" is really a large set of extensions to IE and Windows, including Microsoft's full text search engine.
It's good. The Onfolio - Read RSS reader beats every other Windows client I've looked at - and it's free. The toolbar gives IE tabs. The rest of the Onfolio suite is enticing.
It's good, so it's also bad. IE 7 is extremely unimpressive, but IE 6 with Onfolio will displace Firefox and Google's IE toolbar from a lot of machines. In particular few other RSS clients will work with Microsoft's sharepoint RSS solution (uses another acquisition) -- thanks to Microsoft's control of user authentication.
If you have to do RSS on Windows, this is probably the solution to use. It also incorporates a posting ability which I've yet to test ....