How To Know if a Directory is changed?

Updating Rico’s for Dropbox integration for the Picture Slideshow (yes, it is still up and running) and wondered if the is any node/plugin that gives me a bang when there is a change in the directory.

I know I can just keep on comparing the New and Old Dir output, S+H and an = (string), but perhaps some one has made something more clever.

Watcher (File)

Yep, that is the one, many thanks :)