Watch this "Letter to a Superdelegate" that is addressed to all the voters of PA. Lawrence Lessig has made a very compelling view that should be convincing to all Democrats.
Sorry for the short diary, but thought this should get some play. Lessig provides a perspective that gets cleanly beyond the candidate battle and focuses on the general. PA voters can decide this.
The youtube video is not well synced, but the blip video won't embed. Here is the blip link.