Aknowledging a creator was all the founding fathers did.
While on one hand aknowledging God they agreed (rightly so) that our government should never establish a religion or interfere with a religion or the practice of such that was othwise constitutional. Indeed this also protects the atheist and any other minorty that don't choose to acknowledge a Creator. Complete seperation of the civil authority and relgious "authority" (ones own response to concience) the freedom OF religion and FROM religion.
I wouldnt confuse the pledge of allegiance to infer otherwise.

As for state consitutions, they too follow the same example...which is somewhat ironic given the fact that many states violate this very princple with their laws.