I have been looking for something to export from access to my bright sign units. here is a sample code that calls a query and then prints the data in a RSS feed format that bright sign can see. if you have any VBA knowledge you should be able to reverse engineer this and get it to work for you also. I found this code for a excel sheet but have adapted it for use with access. the only thing is you have to create a data feed with the webUI first with the same name then replace the XML file with one that is created with this code. otherwise it will not show up in your bright author web interface.
RSS feed Example.docx