In the Workflow Administration Console, if you go to Server\External Objects\Data Sources and then select a data source and click "View Linked Workflows", it displays a list of all the workflows that use the selected data source and the specific versions. It would be good to know if any of the versions of the workflows displayed are the latest version.
I am currently working switching all of our MS SQL data sources to use different data sources. Because we need to verify that none of the queries will break when we do so, we have to test them one by one. We have created a spreadsheet to help track the changes, but it would be great if we could use the "View Linked Workflows" to know that the latest versions of the workflows are not using the old data sources. Adding this column would help determine that.