A cost-per-minute clock for meetings is a very striking reminder of the cost of dragging things on. While using it for meetings with lawyers is of course very fun (everybody dislikes lawyers), I find it to be even more needed for internal interminable meetings. When talking with lawyers, everybody already knows that it will cost a lot, but for an internal meeting certain kinds of people tend to forget that a company has an internal cost for everybody attending the meeting.
My girlfriend is an appellate court attorney, and one thing I've learned from her is that the people who get royally screwed in the courts are often those that try to do it on the cheap, either through self-counsel or more often, by hiring cheap lawyers or simply by being unwilling/unable to spend enough to see a case through. So, while this is sort of amusing, I think it misleadingly implies that money spent on lawyers is inherently wasted. I believe the reality is usually the opposite.