It's a typical Ardennes course today, with lots of short, tough, punchy climbs, including to the finish line. So look for a strong classics rider to win. Favorites must include local-boy Philippe Gilbert, Peter Sagan, Edvald Boassen-Hagan, and the current wearer of the yellow jersey, Fabian Cancellara. Among those, I would have to go with Gilbert for the win, but I have a sneaking suspicion that Cancellara will challenge him. "Spartacus" is super-motivated to show that he's fully recovered from the multiple collarbone fracture that derailed his Spring classics campaign. If his team gets him to the finishing climb in good shape, look out.
UPDATE: Well, I had the top four right: (1) Sagan, (2) Cancellara, (3) Boassen-Hagan, and (4) Gilbert.