I've got an article in tomrrow's New York Times about the discovery of a remarkable case of convergence: an ancient relative of today's crocodiles and alligators that evolved a dinosaur's body--80 million before the dinosaurs evolved it. Here's the paper. Update, 1/26 7 am: Here's Seth Sean Murtha's nice sketch of Effigia okeeffeae. A bigger version is here.
Update, 2/1 9 am: Be sure to check out Carl Buell's croc gallery.