For long meetings I've dreamed about having a taxi style fare meter running on the screen. It would add up all the wages of the people present and give a running total for the speaker so they know the (minimum) cost of the meeting.
Normally I hate timesheets, but there is some satisfaction in putting "Company meeting: 4 hours" into a timesheet and knowing the managers will have a mild heart attack when those 4 hours are multiplied for every person across the company when they look at the end of the month report.
