I probably haven't read all of the threads on this matter, but I haven't see any links to the actual opinion of the Court of Arbitration for Sport. Here it is:
http://www.tas-cas.org/d2wfiles/document/1085/5048/0/Pistorius%20award%20
(scanned%20published%20on%20CAS%20website).pdf
Offhand, the analysis of the court seems flawed in its interpretation of the rule prohibiting the "se of any technical device that incorporates springs, wheels, or any other element that provides the user with an advantage over another athlete not using such a device." I would think that, in determining whether a device provides an advantage, the appropriate comparison would be with another athlete who is otherwise similar to the person using the device, not with another athlete who happens to be an excellent, able-bodied athlete with excellent biomechanics. As an example, I'm sure that I would get destroyed by K. Bekele whether or not I used springs or wheels in my shoes, but if I were able to beat some runners whom I otherwise wouldn't beat without the springs or wheels, it seems that my use of such springs or wheels should be prohibited under the rule.