[JamesBarney]

I wouldn't worry about whether someone else has written about a topic.

Worry about being the best written explanation.

For instance patio11 has gathered a huge blog audience, and he didn't do that by writing about things no one else had written about, or knowing more then everyone else.

But his writing is fucking amazing, and that's why I can read 20 pages of his writing while being barely able to make it through 3 paragraphs of other authors.