It's not possible or desirable for Dembski (and the various other members of the US Discovery Institute / CSC like Meyer and Behe) to state their religious position too clearly. To do so would undermine their main aim - which is to introduce ID into school science classes (in particular in the US, where the First Amendment to the US Constitution on the separation of church and state is a major issue).
Of course, the fact that ID does not explicitly refer to any sort of god does not mean that it is constitutionally permissible in the US (see Kitzmiller v Dover Area School District  - readily available on Wikipedia).
I would heartily recommend "Creationism's Tojan Horse - The Wedge of Intelligent Design" by Forrest & Gross for all the background on the ID movement, and in particular how dismally ID fails as a "scientific" proposition. Kenneth Miller's "Only a Theory: Evolution and The Battle for America's Soul" is also an excellent read - much less academic and dry.