It's way off the roadmap for now, but a separate utility to accomplish this might be workable. I can't help but think that the space and network requirements are going to be the same as that of a full backup or restore.
Rather than doing that, why not implement a backup where instead of doing an incremental based on the current chain, you reset the incremental process and start over with a second chain off the same full. I have no name for that, and actually just thought of it, but it would solve some of the problems that people seem to have with backups. That way you reuse your base full backup and still have incrementals.
...Ken
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