One of the benefits of the publicity regarding Terri Schiavo is that a lot of people have decided to create living wills that unambiguously state their desire to be taken off life support in the event that they are declared to be in a vegetative state. Both of my parents have told me informally that they would hate to be kept alive in that kind of state, and I feel the same way. I'm going to call them next week and make sure that they've got this down in writing. I'm also going to contact an attorney and create a living will of my own.
One area that I don't know much about are the options that are available for ending my life in this kind of situation. When my cat was dying of cancer after using up his nine lives, I was thankful to be able to do the kind thing and end his life with a couple of painless injections. The first injection was a powerful anaesthetic that put him into a deep sleep. The second injection stopped his heart in a few seconds. It was terribly sad, but he died comfortably, surrounded by people who loved him, and it was the most loving thing to do under the circumstances.
When I hear about letting people on life support die by removing their feeding tube, it sounds like a lengthy and painful process. If I am unfortunate enough to end up in a vegetative state, I would want the executors of my living will to end my life quickly and painlessly, just like I was able to do for my furry friend.