Complex sentence: Eric Burns of the Websnark blog became the editor of Modern Tales' newly-announced free content in December of 2005, although he was replaced by Shaenon Garrity, creator of "Narbonic," in August of 2006.
Split into simpler sentences: Eric Burns of the Websnark blog became the editor of Modern Tales' newly-announced free content in December of 2005. Burns was replaced by Shaenon Garrity, creator of "Narbonic," in August of 2006.