Yep, we put our child on the Westpark Montessori waitlist when we were 4 months pregnant. I thought it was totally crazy at the time, but I'm not complaining now. We got the call when she was 16 months old for a spot in the toddler room. It was a lot earlier than we thought we were ready for, but we were worried about how long it might be before we got another call, and my babysitter had just announced out of the blue that she was going on a 3 week vacation, so we went ahead and put her in. Never regretted it. She loves the program. They potty-trained her. We love all of her teachers.
My understanding is that the Leport wait lists are much shorter. I've never had any friends have any problems getting their children into the Lake facility within a 3 month period. I have no idea why their wait list is so short compared to Westpark Montessori. My friends all rave about the Leport program. And these are some pretty particular parents, so I have no doubt that they have an excellent program. If we didn't get into the Westpark Montessori, we would have sent our child to Leport.
One thing that seems to help in terms of getting your child in sooner than he/she otherwise may get in is if you know other families that attend Westpark Montessori. Tell the director that you are friends with these other families and use them as a sort of reference for you. Ask your friends to talk to the director about your situation. Sometimes if there is a surprise opening (e.g. somebody moves midyear), they'll consider your application for that spot.
Good luck!