Sorry to bump such an old thread, I've enjoyed reading it and was hoping someone here might have insight. I bought the Sony KDL 32L4000 720p a few months back, great TV. They advertise it as supporting 1080p through HDMI:
"Video Signal : 480/60i, 480/60p, 720p, 1080/60i, 1080p (HDMI™ only)"...