I've never heard of *folksonomy*, "the process of adding keywords, or tags, to data in an effort to arrange it into loose 'clouds' of connectivity," but if you're into that sort of thing, [Giles Turnbull](http://www.macdevcenter.com/pub/au/1154) at [MacDevCenter](http://www.macdevcenter.com/) has written up a quick Automator and Spotlight [walkthrough](http://www.macdevcenter.com/pub/wlg/7050).