What is the experimental status of AdS/CFT, AdS/QCD, AdS/CMT, etc? What experiments have challenged or supported AdS/QCD, AdS/CMT, etc? What experiments should we look forward to do this?
 A: According to the Backreaction blog there is evidence from heavy ion collisions that contradicts Ads/CFT. However even is this is true (I have no way of judging) all it contradicts is the application of Ads/CFT to heavy ion collisions, and everyone knows it could at best be an approximation because heavy ion collisions aren't supersymmetric.
At the risk of stepping beyond my (meagre) knowledge of the area, at the moment there can't be any experimental tests because the CFT bit of Ads/CFT has to be supersymmetric and there are no know supersymmetric physical systems.
Response to comments
As various comments have pointed out, my second paragraph is unnecessarily pessimistic. Ads/CFT has been applied in many areas where it is thought to be a good approximation if not an exact description. Also see Condensed matter application of AdS/CFT for more on this subject.
A: An important result of AdS/CFT is the calculation of a lower bound for the ratio of viscosity and entropy density of a relativistic fluid, 
$\frac{\eta}{s}=\frac{1}{4\pi}\frac{\hbar}{k_B}.$ 
This is consistent with the outcome of experiments at the RHIC, in which the role of the fluid is played by the quark gluon plasma. 
