You'll have to subscribe for that one... (((sigh)))...
But I didn't heard of the fake Steve myself, but I'm not sure why going through the trouble of identifying the author?
It's not like he was hiding it that he wasn't THE Steve, I mean his blog is called "fakesteve.blogspot".
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Edit:
Two hours later, I found
this article on Yahoo about the discovery of the true identity of the fake Steve Jobs blogger.
Not sure if it's as good as the one Gunug posted but it gave me some insight (really never heard about this before) and it's nice if you don't wish to sign up to read the article.