Are Atheists Really Agnostic?

Austin Cline has posted on atheism, Christianity and agnosticism. Another example of the use of the weasel word "agnostic." As you can tell from this comment, and others on this blog, this blogger has no use for this word as it usually is used. Anyone who is sane, or not totally deluded, is agnostic about the existence of a deity, so why call yourself an agnostic?