SeedCode Complete comes with a couple template scripts that you can use as the basis for email notifications as events are coming due. Check out Email Notifications in this documentation for more.
If you're a little adventurous and on a Mac, you can use Growl to send notifications to Mac users on your network (who have growl installed) and/or to their iPhones (which also need Prowl installed). Though a little tricky, this is wicked sexy.
You can take the same email notifications scripts we've prepared, but tweak them to send growl notifications instead of emails:
Thanks to Todd Geist for the tutorial. Need help with this? Feel free to get in touch.