All my backups are self-managed. It would be really great to be able to annotate a backup as to the state of the antlet being backed up. When developing a new antlet I often do a series of self-managed backups as I make major changes to the antlet. So, if something goes wrong, I can always restore to an earlier version rather than starting from scratch.
I can keep a log with the ID and annotation, but it would be really handy if this was part of the backup process.