InfoPath Dev

How would one use of Active Directory within the form? Sorry for all the questions, like I mentioned above I am new to InfoPath.  I see alot of usefulness for it. Would I have to populate a field with every name and e-mail address some where as stated in the previous post?

qwerty You wouldn't have a way of using active directory or step by step process in accomplishing the fx function.  In some of the TO fields I have drop down menus for supervisors in different departments.  Example: TO                 ...

I have designed a blank form, using 2007, and had published the form to SharePoint 2007 in a form library, and tried to use the out of the box workflow.  The workflow in SharePoint seems to be screwing up. Here is what I have within the form; I have a table of four columns with 10 rows: TO    ...