Widely suspected, but now confirmed: the alphabet network has decided to enter "Pushing Daisies" as a comedy series at the upcoming Screen Actors Guild Awards. Category declarations must be made now for the guild prize. Obviously, the decree will probably apply to the Golden Globes and Emmys, too. The Hollywood Foreign Press Association has a tough eligibility committee that may disagree, but that's not likely. "Daisies" pushes just enough comic buttons to qualify, methinks, even though it also has dark dramatic turns and it's an hour -long weekly show. That time length is a curious new trend. It used to be a fluke when we spotted one-hour comedy contenders like "Ally McBeal." Now we're seeing lots — including "Ugly Betty" and "Desperate Housewives."