An item kind of "workflow" and itemId of "<workflow-def-name>" are now supported (only "jbpm$wf:adhoc" works though at the moment). Showing the form, selecting an assignee and submitting the form will start the ad hoc workflow and create a task for the selected assignee.
NOTE: Support for 'packageItems' is not present yet.
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@21021 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261