Hmmm... Well, for anyone else that is looking for this functionality here is an add-on service that I just built that contains a call to retrieve a list of WorkflowSteps.http://www.box.net/shared/6qqraqqz9pWorkflowStepTypeHandler:    This is web service add-in for Axosoft's OnTime SDK for OnTime 2007. It allows you to retrieve a ...

In looking at the database and how MultiSelect data is stored, I attempted to set the CustomFieldValue.Value to the XML structure that I found there, and it worked great.  Below is the function that I call for the value of the customValues() argument of the IncidentHandler.AddIncident method. Hope this helps someone out there, ...