InfoPath Dev

Everyone at my federal agency has InfoPath 2003 installed on their machines.  I have several sites using InfoPath 2003 forms and the forms open nicely for all to use.  We have recently turned on Forms Server and when I create a new form in InfoPath 2007 and tell it to publish to Forms Server, everything works nicely too.  My ...

I have a very large spreadsheet that I have imported into SharePoint.  Is there any way to use the data from the sharepoint list, to populate an InfoPath form?  What I would like to be able to do is create a drop-down field in InfoPath that reads from the SharePoint list.  Once a value is selected in InfoPath, the SharePoint list ...