Timothy,
Yes, newer versions of the DataWidgets module contain a Javascript action that will export to Excel.
Hope that helps,
Mike
Mike's answer probably gets you what you need, but if like me, you ran into troubles with the downloads (double records, only first page instead of everything) then you have the alternative to use module SimpleExportToExcel. No hassle, easy and straightforward. Downside: you have to determine the columns at designtime, no variations at runtime.