I have not been to WDW in Nov, but we are going in Nov 2008, so I already asked this question a while ago. We go to DL every Nov/Dec and they say it is pretty much the same:
My DH wears shorts in the day, then changes into pants, long sleeve, and sweater at night here in Cali. I wear jeans, and massive layers at night here because I am always freezing. However, I don't think FL is as cold as Cali in Nov (especially the first week).
So this is what we're going to do: take everyday in stride. I myself am planning on the long shorts to the knees with tanks or t's everyday. Since we have a little one, we will go back to the room, and change for nighttime in the parks: jeans, sweaters all around. Hope this helps!