There are a few articles on the Reds/Phils series on fangraphs. Dave Cameron has an interesting take on the series; essentially, he suggests that the Reds/Phils series is a lot closer than most people think. The Phils have a substantial edge in starting pitching, but the Reds have advantages in the bullpen, offense, and defense.
Fangraphs also has a few interesting posts on Roy Halladay and Drew Stubbs.
BP also posted Reds/Phils series preview, though you need to be a subscriber to see the full article.
Tim Kurkjian has an article on ESPN.com.