A number of enhancements have been made since the 2006-02CTP and 2006-03CTP releases. The most visible will be the visual feedback for the live error validation. Any element with errors will display with a hatched red background. You can see the errors under the 'Validation Errors' sub menu off the context menu. Selecting an error from the list will activate it, which puts the editor in the correct state to fix the error. You can also double-click any shape with errors to activate the first error in the list.
Our generation UI is also much improved. For DDL, XSD, and object model generation make sure your .orm file is in a C# (VB or J#) project. Select the file in the Solution Explorer and set the CustomTool property 'ORMCustomTool'. Click off and back on the item to see the 'ORMGeneratorSettings' property. Note that code generation requires installation of the http://www.sourceforge.net/projects/plix project.
This includes changes through revision 575 in the subversion source.