After Effects 6 now supports scripts. One of those scripts can actually render a file then email you upon completion. If you're a tech geek, the gears in your head are already spinning. Most pagers and cell phones can receive text messages via the Internet. Just think, the leash has been cut!
Open up your General Preferences and be sure that the Allow Scripts to Write Files and Access Network box is checked.
Add your files to the Render Queue like normal.
Choose File > Run Script > render_and_email.jsx, you will now be prompted for your email settings.
Enter server smtp address: such as mail.mac.com, click OK
Enter the reply to address: such as the email you want to use to send the message.
If your server required log-in (most do), click YES and enter your ID and password. Click OK.
Enter the recipients email address. Click OK
An email with the subject AE Render complete will be sent when the queue is finished.
How cool is that?