I have stumbled across a service called Wakerupper. Essentially you just log on to the website and schedule a phone call to be placed to you on the date and at the time that you designate. The website promotes this as a great way to schedule a wakeup call or to schedule a reminder.

What the website fails to mention, however is that this service is also a great way to schedule a phone call to be placed to your cell phone in case you need to get out of a meeting that is running long.