A fellow Mac admin has improved upon my solution to Active Directory password expiration management and has made his project available on Google Code. Password Monitor is an app that lives in your menu bar and unobtrusively displays the number of days remaining until your AD password expires.
Anyone who is either already using one of my scripts or widget or is just looking into a way to solve the AD password expiration problem should definitely give this a look. One key difference with this solution is that you must set the expiration age of AD passwords manually. Since this information is easy to obtain from your AD admin, it should not be an issue. Here’s what the preferences window looks like.
Keep in mind that the project is in its early stages, but it is quite useable now.
UPDATE: The current version is incompatible with Snow Leopard. The bug has already been reported.