It is still Beta so I don't recommend you to rely on it while developing
real-world commercial products.
What is written in Official FAQ
(
http://lab.msdn.microsoft.com/express/faq/default.aspx#vcsharp):
What can I do with the Express products?
a.. Learn how to program using a streamlined, lightweight development
environment with built-in tutorial content
b.. Evaluate the .NET Framework for Windows and Web development
c.. Create fun and interesting applications for their personal enjoyment
or to share with their friends, or ___even commercially distribute your
programs___.
Gaidar