want to get signalled, when a command line job on your computer is done?

I have a long list of cpanm jobs,
don’t want to put them in a batch all toghether,
and want  to get signalled, when each of them is done:

$ while true; do beep; done

In my case the beep is acutally just the flashing of an xterm window.

Update:
Yes, notify-send is far, far, far superiour, growlnotify on OS X.
Thanks for the pointers!