Unlikely that you will see the same set of essays. But overall the theme is similar : Why MBA, Long-term & short-term goals, How you can contribute to the diversity of a particular school, Leadership examples, time when you faced a challenge at work, ethical dilemma etc.
Once you have good answers to these kind of questions, just a matter of using these common themes and fine-tuning to each school.
Many folks suggest that you start with Kellogg's essays as they cover most of the areas you will see elsewhere. Good luck.
So I am waiting to apply to B-School until Fall 08, but I am wondering about how consistent the essays tend to be year-to-year. Are they relatively similar? In other words, can I start to think about how I want to answer some of the essays that I see now?