What's stopping a 7.x-2.0-alpha1? Am thinking of including it in http://drupal.org/project/drupal_forum .
Cross-referencing #1392346: Roadmap 7.x-2.x, just in case.
There's a common issue for 2.x #721974: Roadmap for 6.x-2.x
Here's one release blocker: http://drupal.org/node/744374
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