I've heard "apatheist", too, but I don't think that's right, at all.

After all, the position I described is not saying "the existence of gods is irrelevant and/or uninteresting", it says "Since there is no evidence for any gods who actually exist, I believe in no gods. There may or not be gods who are not real, but who cares? Since they're not affecting the real world, their existence has been predefined to be unknowable, incrutable, and totally irrelevant. As soon as they BECOME relevant, they fall into the first category and their existence can be measured and proven."