I would just go with what a lot of people on NAM said.
I wouldn't rush into a $30,000 car purchase just because a MA is pressuring you to "BUY NOW"
This is a car that you will (hopefully) be living with for 5-10 years. You don't want to cut corners. Even if what they are telling you (about no ordering in June) is true, you will more-than-likely be able to find a low-mileage pre-owned or even a 2010 new Mini that some dealer is dying to get off their lot in a few months.
If you are like me, however, and once you decide you want something you need to get it FAST, then just make sure you call around to all of the area dealerships and confirm what your MA is telling you is true. Another dealer may be willing to work with you to get what YOU want, and not what THEY want.
I got my 2009 MCS from Mini of Sterling last August, and they had more selection that I knew what to do with. I was planning on custom ordering one, but they had one on their lot that had EVERYTHING that I wanted, minus 1 or 2 options that I could have done without anyhow.
Good luck with the Mini hunt!