The Q2 2009 CAB kit has been uploaded to the site and you can download it at will. It still features the old DockingManager control (rather that the new RadDock), but this will be fixed for the upcoming SP1 next week.
As to Enterprise Application Blocks 4.1, we are actually not using any part of the Enterprise Application Blocks. As far as I know, the Compososite UI Application Block or CAB is not part of it.
We are however using the latest version of CAB (from April 2008).
the Telerik team