The XENON collaboration announced their results at the American Physical Society's April meeting in Jacksonville, Florida, on 14 April. Their work pushes the maximum possible strength of WIMP interactions down by a factor of six from the previous record, set by the Cold Dark Matter Search (CDMS-II) experiment at the University of California, Berkeley, in 2005. The new limit is stringent enough to test some particle-physics theories of supersymmetry.
This will only will that make it more difficult to detect. The good thing is that this results eliminates several theories about Dark Matter in one stroke.