In my experience, entrepreneurs are a hit or miss to top MBA programs. Meaning, very few are wait listed or on the borderline, and usually it's quite clear whether or not they will be accepted. I believe there are a couple of factors that cause this:
(1) You don't really need an MBA to be an entrep. In fact, most of our best known and successful entrepreneurs did so without an MBA (many without even a college degree!). The challenge, therefore, is to try and demonstrate or prove that an MBA will actually make you a BETTER entrep. It's not impossible, but just something to bear in mind.
(2) There are not many entreps who apply to business school, so for that reason you will stand out in all the right ways. You will be able to teach your peers quite a bit through your experiences, and most top MBA programs really value that.
(3) It's difficult to show what you'll do with your degree post-MBA. If you go back into entrep then you face the challenge outlined in #1. If you go into consulting (as you mentioned), then you need to prove to the adcom how your entrep background will help you to land a job with a consulting firm. Again, not impossible, but these are the points you'll need to focus upon.
There are of course many more details and facets to the process, but off the top of my head, these are the ones where I'd focus in the beginning.
Hope that's helpful,
Former Kellogg adcom member, offering a new approach to MBA Admissions Consulting.