The biggest thing that has changed in this release is the approach to BASE HREF. which impacts all edit_form's the actions for edit forms in ZOPE works is usually the method you want to call. but now you must specify the object's ID in the action.
This is also a feedback release to show the community what we are working with to get to 1.0. It comes with DCWorkflow and does lots of magical things on installation.
Please help out by giving feedback. When we hit 1.0 - we hope not to have to do too much catch up work until CMF1.3.