I had suspected this would be the case. Originally when the express products were released last Novemeber, they stated that they would only be free for the first year. Now they have revised this and stated that they will be free indefinitely.
Although you may not use any of the Visual C#, Visual Basic (Marcus), or Visual Web Developer because you have MSDN subscriptions, the key one being free is SQL Server Express . This will be used more and more on systems and is a great way for any application that needs to do simple data storage.
If you haven't downloaded any of them yet, you can at the url below.
Express Editions
Read the complete post at http://www.dotnettipoftheday.com/blog.aspx?id=262