YA, if we keep this thread up Soctty can chime in. He's done some excellent things with So. Mags in Kingston.
I planted a small BBB last year and protected with with frost cloth and mini-lights. The foliage came through OK (anywhere that there were no lights was damaged) and a small branch did die, but I think I damaged it while putting on the initial protection in place. FYI the low at my place was -31C, with weeks below freezing.
Here is the Magnolia in early April of this year:
<a href="
http://home-and-garden.webshots.com/pho ... wpPW"><img src="
http://inlinethumb07.webshots.com/45062 ... 600Q85.jpg" alt="144"></a>