Hi Russ,
I never really considered Austrian Winter Peas until I recently read this article:
http://www.sare.org/handbook/mccp2/fieldpea.htm
They would be a summer crop for us, but might be a good one to try mixed with soybeans or planted side by side to see how they compare.
Did yours reach 2 ft in height? Do you need an inoculant to initiate N fixation?