If you're willing to accept an answer to the more general question "is there a way to have me alerted when something completes in a Terminal window" then the answer is: yes.
If you're running Growl you can make a command line call from a script that will post a notification to Growl. For example:
do shell script "sleep 1h"
do shell script "growlnotify --sticky --message \"I'm all done sleeping for an hour! Did you forget about me?\" --wait"
The script won't exit until you clear the notification from the screen.
You could even use the --name option to give your script a unique name, and then from within Growl customize how events generated by that named application are displayed and dealt with. They can produce different types of pop ups on the screen, they can email you, they can send a message to you via iChat, they forward the event to Growl on another machine, if you're running Prowl on your iDevice they can even forward the notification on to your iDevice via push notifications.
Not quite the answer you were looking for, but hopefully it meets your needs.
