Crocs are the best thing I've ever done for my lower back. Pain gone.
Pete, careful man, DON'T wear those crocs on a smooth, wet surface! I've got a torn muniscus (sp?) as a result. I still like the crocs, but have relagated them to house slippers.
I've found anything other than low-mid priced shoes were the answer to what I was told was plantar faciitis, my wife convinced me otherwise (she used to sell shoes).
(Bill) Keen are great example of casual/water shoes with excellent support for the foot (and whole body, back, etc.) Bill has since left and started Mion brand, which are primarily water shoes. Not much better in the looks department, compared to those five fingers, (can you say "clown shoes"?) but the support is impeccable.