As part of our redesign we are consolidating our XML/RSS files into a new single feed. While the old ones will still be available for a short while, we urge you to update your feed address to http://feeds.feedburner.com/strykernews.
If the whole idea of RSS and feeds is new to you, Feedburner offers a very good tutorial. Try it out - it might change the way you keep track of content on your favorite sites. If you decide to try a feedreader let me know. I would be more than happy to share a file that includes all of the feeds I track to find Stryker-related news.