ArcScripts - EditorID 1.4: "EditorID allows you to track who edits the features in your geodatabase, and at what time they were last edited. As you edit, a field called 'EditorName' will be updated with the current editor name. And a field called 'LastUpdate' will be updated with the current date and time. Optionally, with ArcSDE, EditorID can populate a 'VersionName' field, if you wish to track the version in which the edits occur."