A quick update on a very important topic: my quince tree.
The petals have all dropped off now, and the base of the flower has started to swell. Each of the five or six fruit (it was hard to count them because of the wind) is about a half inch in diameter - a bit smaller than a grape. As can be seen in the photo below, they're also already starting to turn yellow.
I believe the fruit above is from the flower pictured in my last post on the topic. The stamen look rather eldritch to me. Hopefully that will scare off the deer.