I agree with the [current] 4 replies, but why-o-why is eli downvoted for this opinion? It's not spam/troll, it's not badly put, it's not a priori based on a falsehood.
Eli is not adding anything to the discussion. S/he is not disputing the content of the article; just the motive. Are we going to have an SEO discussion about every article that makes it to the frontpage?
I can respect not wanting to have constant meta-discussions about each submission, but I think SEO is an interesting topic in its own right. Especially the sneaky-but-still-white-hat type. I'm not even sure there's necessarily anything wrong with it; it's ultimately based on creating content that people want to read. (I didn't flag this article, for example. It's an interesting story.)
But I think it's worthwhile to note that this post was almost surely written with the primary intent of boosting page rank as a sort of guerilla SEO.
Do not downvote for mere disagreement. /grrrr