[a1369209993]

I don't actually have a problem for this to solve - like the rsync guy, I know how to use actual `tail -f` (and eg `perl -E` et al) - I'm just self-aware enough to realise that most people either aren't up to the task of hacking together whatever functionality they'd actually end up using out of generic utilities at all, or at least wouldn't consider that so easy as to be the path of least resistance to get something done.