The Server Upgrade and Migration tool allows a SharePoint farm administrator to change hard-coded URLs in InfoPath form templates, UDC files, and content types to ensure that the form templates continue to work correctly in the following circumstances:

• When performing a gradual upgrade from Microsoft Windows SharePoint Services 2.0 to Microsoft Windows SharePoint Services 3.0 or from Microsoft Office SharePoint Portal Server to Microsoft Office SharePoint Server 2007.
• When migrating InfoPath forms and form templates from one Windows SharePoint Services 3.0 or Office SharePoint Server 2007 or Web site collection to another.

During a gradual upgrade, the Windows SharePoint Services 2.0 server is temporarily renamed. The tool can be used to change the following hard-coded URLs so that InfoPath forms on the renamed server continue to work during the upgrade process:

• Data connections to the local server contained in the InfoPath form template

After a site collection is upgraded, the tool is used again to change the URLs back to the original name.

The tool can also be used on a Windows SharePoint Services 3.0 server after content is migrated from one location to another to fix up URLs that may be broken by the move. Similarly, the tool can be used to fix up URLs when a backup set is restored to a new server or when an existing content database is attached to a new server. When the tool is run on a Version 3.0 Web application or Web site collection, the following are also updated:

• Data connections to the local server contained in data connection files in a data connection library
• URL to a form template contained within a content type

I wish I had this tool last year when I had to move an InfoPath app that used a SharePoint list as a secondary data source onto another server. I did it the hard way by saving out the individual files in the xsn and then using the cab sdk to put it back together.