It's been a while since I've posted, but I promise you it was worth the wait :) We've finally got a public beta of our RSS Feed Viewer gadget up on the Windows Live Gallery! This gadget will allow you to view your subscribed RSS feeds (from IE) on your Windows SideShow-enabled device. Here's a direct link to the gadget:
Since it is a beta, be sure to check out the release notes. We'd also appreciate your feedback, bug reports, and suggestions in this thread in our forum.