MSDN Tester Center
The Tester Center team has been hard at work since launch day coming up with new content and adding features to the site. If you head over to the site now, you'll see an RSS feed containing all the content from the site. New content should appear in the next few days.
The team is working hard on getting into a regular publishing rhythm. Feel free to send us your comments and submit articles. (The article submission got pulled from the site for a couple days but it will return soon!)