The next Debian version Wheezy is scheduled to be frozen (no further package transitions except for bug fixes and important packages) in June 2012. Our plan is to prepare first test boxes shortly after the freeze.
The final release date may be 3 to 6 months after the freeze. We hope to provide BatchFarm nodes and desktop support soon after the final release.
-- ChristopherHuhn - 30 Jun 2011