Just use Shimano SPD with the multirelease cleat.
Personally, while I do use clipless pedals, if I had some physical problems that limited me like that, I would just use ordinary pedals with toe clips. The advantage is not great enough to bother with mechanical contraptions in a case like that.
What with being lucky enough this late winter and early spring to be able to ride near the North Pole, I've been riding strictly on the flat side of Shimano M323's, with ordinary running shoes, and on the same routes... no change in average times. In fact, no perceptible difference at all.
Last edited by Longfemur; 04-03-09 at 05:49 AM.