I see this thread is winding down and I already added my thoughts in my earlier post quoting the available studies of which I am aware. But I wanted to add one last thought to those who are wondering if they should try minimalist shoes, or, have tried them and are struggling. Understand that there are many different foot types and even several different types of 'flat feet'. Some feet may flourish in minimalist shoes and some may suffer. Seeing that someone hiked a long distance trail in minimalist shoes and concluding that is the correct path for all would be akin to hearing that your friend read War and Peace without glasses and reasoning that you can throw away your glasses. Every case is unique.
Combining the variety of foot types together with body mass index (being over your ideal body weight), condition of knees, hips and back along with any other medical issues creates many variables. There is merit to the minimalist shoe theory if it works for you. If it does not work, than certainly moving toward a lighter weight shoe yet retaining the structure you feel you need would be a worthwhile goal. And understand, as Ryan pointed out along with many of the others who posted, trying different types of footwear is a process of trial and error, not to mention cost. And as trip length, weight carried and terrain changes one may want or need to change the types of shoes they wear for the occasion.