I used this years ago. I had a few scripts that would copy files to the appropriate tags, but it ended up being super slow. Eventually I wrote my own tools around the sqlite database it created (it's a pretty simple schema) but I've since lost most of those and ended up rewriting a bunch in a system I've been working on.

This was all back for the 0.2 release and I think the author changed a bunch of this stuff in later releases. I wish there were more options for tagging file systems in Linux. If I ever get my stuff out of the "thrown together" phase, I'll probably publish them.