One of the PMs on my team emailed this to me today:

Feedster is a search engine for weblogs, as you probably already know. What you might not have noticed is that after performing a search, you can grab an RSS feed to your search query (there is a row of feed links across the top of search result pages). So, what this means is that if you do a search for, say, [XAML] [Windows Longhorn], or [SourceSafe], you can have a constantly-updated impression of what the blogging community at large thinks about these projects today (and tomorrow, and the day after).

 www.feedster.com

RSS consumption is good for your health!