I'm a lazy girl, so I save my forms as source files, then open up manifest.xsf with a text editor and use find and replace to replace my server name in my data connections. You'll be looking for xsf:adoAdapter and in the connection string property, you'll see Data Source=OldDataSource. You can change to NewDataSource and save. Open manifest.xsf in design mode in IP, test and republish.
All the usual warnings apply -- save a copy prior to mucking about in manifest.xsf, find and replace ALL is not always your friend, etc., but it will save you some time!