While retrieving a file from an email may be a bit tricky, using the same method @JasonWalker suggested (Scheduled Activities via Web Reports), you can have Web Reports automatically generate and archive a report to the filesystem. These reports could then be processed automatically without any human interaction. By default, the reports would be saved on the Web Reports server itself, but via configuration, you can modify the ArchivePath location to be anywhere (assuming the account that Web Reports is running under has the necessary permissions).