> Some mechanism, not yet existing, would have
> to be invented to let the watcher tell my viewer that something new
> and interesting (as defined by my script) is out there.
What do you mean by "my viewer"? If, for example, you're willing to be
notified by email, the watcher can simply send you an active email (e.g.
Safe-Tcl) message that points you in the right direction....