Oops, I’m Late! is a Windows Mobile app that takes a look at your location via GPS, compares it to your appointment in Pocket Outlook, and then if things are going badly auto-sends an SMS message to attendees (or your secretary) letting them you know you’re en-route but late. It’s a little steep at $69.99 for the Standard and $99.99 for the Pro (the Pro lets you use email instead of SMS and also set a default contact rather than just the attendees).