There is positive evidence for ID - the impossibility of life arising from inert matter is one recognixed by scientists, the extremely well designed universe is also another evidence recognized by science, Behe's claim of the irreducible complexity of the bacterial flagellum is also strong evidence for ID and it has not been refuted.
except that he spins them as opportunities for further research instead of criticisms of the theory.
What Dembski shows is that ID can be the basis of research. Whether people do the research or not is irrelevant as to whether the theory itself is correct. Anyways, the research is taking place regardless of what it is called because life is indeed intelligently designed and the findings of real scientists doing medical, biological and other research are showing the complexities of life. These ever deepening complexities show the interconnections of all functions of an organism, interconnections which cannot be altered either arbitrarily or randomly.