I posted the finished version of the summer card a few posts ago, but here are all four designs in digital form (colours are not final--I generally mix them right before printing and tweak them as I go until they look right.
Spring: oak and hare
Summer: bamboo and fox
Autumn: maple and grouse
Winter: spruce and raven
As mentioned, summer (fox and bamboo) is printed. I have the plates made for winter (spruce and raven) and may start printing tomorrow before I teach, though my time will probably go mostly toward reprinting the winter holiday "Catching Snowflakes" fox card and the blue jay card, as they're my best sellers and the first colour on both is a soft black. As for spring (oak and hare) and autumn (maple and grouse), I've just sent the files to film, which (if I'm lucky) might come back tomorrow so I can make the plates. But we'll see.