Birding Babylon -- does the title of this book sound familiar to you? If so, then you, like me, are one of thousands of people who have been reading the author's blog with the same name. Birding Babylon: A Soldier's Journal from Iraq by Jonathan Trouern-Trend (2006, Sierra Club Books), is one of only a handful of published books out there that began as a series of entries "posted" on a public blog instead of a proposal sitting on an agent's desk. But even when it was "only" a blog, excerpts were quoted in the media and the author was interviewed at least once (by National Public Radio) while…