This is one of the most useful systray apps I have seen in a long, long time. This would resolve a major issue for me. I have a weirdness lately where sometimes I put my laptop to sleep and then it doesn't really go to sleep, it's like a child that wants back up...
Love the creative resolution!
Brien Schultz has tied together some .NET and come up with a fantastic program called bedtime which uses the accelerometers in most modern laptops and tablets. His program monitors these accelerometers to detect if you laptop is moving, if it is moving, a countdown to suspend is initiated.
Credit: The Student Tablet PC » Blog Archives » Bedtime in a backpack