Though I don't believe that the use of "God" as an explative is what is prohibited in the commandment in question

(I think it's closer to what Alex said--though I think it's related in spirit to the New Testament warning about attributing the work of God to man or the evil of man to God. But that is often done when we use the name "lightly")

I have a problem with the use of "God" as an explative on the general principal that it coarsens and weakens the language.

It weakens the language in the same way hyperbole does. One reason that language evolves is out of a growing need to accomodate more expression. For example, when a politician, for the sake of winning a political battle, refers to a smaller problem as a "crisis", we soon have no word with which to refer to a real crisis. When we're so pissed off that we use "God" as an explative, there is nowhere to go to add more meaning to the expression (does that make sense?).

Furthermore, it is interesting that, in a politically correct atmosphere that is the current age, for some reason society feels little hesitation in using a phrase or word that would be offensive to an entire class of people. ...After all, the whole point of politically correct speech is the avoidance of what might be offensive to a group not your own.

Just my thoughts--JH