I just got this email from WotC:

Quote Originally Posted by Wizards
I wanted to inform you all about an important decision that Wizards has made regarding the D&D Virtual Table and Virtual Table Beta. While we appreciate the enthusiasm and participation in the Beta phase, we were unable to generate enough support for the tool to launch a full version to the public. Effective July 30, 2012 the D&D Virtual Table Beta will be coming to an end and the VT will be closed.
I am very disappointed in them.