No it wasn't. The hoax was only that this guy Eisenstadt was the source:
http://www.nytimes.com/2008/11/13/arts/television/13hoax.html>
> It was among the juicier post-election recriminations: Fox News Channel
> quoted an unnamed McCain campaign figure as saying that Sarah Palin did
> not know that Africa was a continent.
>
> Who would say such a thing? On Monday the answer popped up on a blog and
> popped out of the mouth of David Shuster, an MSNBC anchor. "Turns out it
> Martin Eisenstadt, a McCain policy adviser, who has come forward today
> to identify himself as the source of the leaks," Mr. Shuster said.
>
> Trouble is, Martin Eisenstadt doesn't exist. His blog does, but it's a
> put-on. The think tank where he is a senior fellow -- the Harding
> Institute for Freedom and Democracy -- is just a Web site. The TV clips
> of him on YouTube are fakes.
<snip>
> The pranksters behind Eisenstadt acknowledge that he was not, through
> them, the anonymous source of the Palin leak. He just claimed falsely
> that he was the leaker -- and they say they have no reason to cast doubt
> on the original story. For its part, Fox News Channel continues to stand
> behind its story.
<end excerpt>
Michael