Mirror Backup with Multiple Databases

We would like to use the mirror backup to create one backup job that creates two backups in two different locations with different file name formats - a wonderful new feature in version 5. However, this feature only appears to be available when backing up only one database. If I select multiple databases when creating the schedule, that option disappears from the dropdown. Are there any plans to make that feature available for multiple database backups, or is there a technical reason why this feature was implemented this way?
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SQL Backup Consultant Developer
Associate, Yohz Software
Beyond compression - SQL Backup goodies under the hood, updated for version 8