The main window showing three users:

The dialog to change a user's password:

Direct editing:

The Edit menu:

Being nice on exit:

In shell mode, things ain't perfect. If you know how I can tell Ruby to turn echoing off, tell me in an e-mail, please.

Drag'n'drop in action. user has already been dragged over, joe is on his way (you don't see the mouse cursor on the screenshot).