This article applies to InfoPath 2007 only as 2010 and 2013 no longer have this limitation. At some point during your career, you will need to connect to a SharePoint list to retrieve information for a drop down list.  This process has changed since 2007 but I thought that I would go ahead and share… Continue reading InfoPath 2007 – Populating from data/dropdown info from SharePoint lists using XML form data