InfoPath Dev

 Thanks guys, I believe this will work though I haven't implemented it yet.  I don't mind manually creating and changing the data source nodes in code now that I know that's how it must be done.  

I'm working on a form that will have a set of repeating rows.  In each row are two columns, each containing a dropdown listbox.  Selecting a value in the first dropdown will determine what items are available to be selected in the second dropdown.  All values come from a SQL Server database query. I need the form to be browser ...