Lookup untagged items

Being able to look stuff up by tags is great! What about adding functionality for Sandy to send you a list of everything you haven't assigned any tags to, so that you can run through and add tags to those items? (I know you can get such a list on the Website, but that's cumbersome...adding tags there means clicking on each item individually, rather than being able to send her back an email with line-by-line instructions.)

Thanks!