Why Ray Bradbury Was Ahead Of His Time" for the Boston Globe shows some good insight into what makes some of Bradbury's science-fiction stories tick. Steve Balshaw, writing for Mancunian Matters, reminds us that Bradbury wasn't just a writer of science-fiction, but arrives at some similar conclusions.
While I like both of these articles, they both reflect on the familiar "classic period" of Bradbury, and fail to even acknowledge anything he wrote after 1962. Still, it's good to see that there are plenty of intelligent readings of the familiar works out there.
Bryce Wilson, writing for New Times doesn't go so deeply into the individual stories, but does grapple with the most appropriate way to characterise Bradbury as a writer. He suggests "Midwestern surrealist" might be an appropriate term, or at least a term that is as good as any.