vhbinteresting article in st.petersburg times 10-21-07,seems USF IS testing power knee on 12 individuals at university of south florida,backed by a ONE million dollar grant from the deprtment of education,artical said power knee is used now by only 40 people world wide.most users seem to like it ,but has many minor bugs to work out.jason highsmith,an assisant professor of physical therapy plans to publish the results of the knee study early in 2008 in a scientific journal.