Why aren't the superdelegates committing?

As Matt points out, they undoubtedly already know which way they're going to go, so why are they subjecting us all to this painful ordeal?

Working theories:

1) They are afraid of retaliation by a vengeful Senator Clinton

2) They are afraid that she will somehow get the nomination, and retaliate from the Oval Office

3) They need the Clintons to fundraise for the general

4) No one wants to be the guy who put the last nail in the Clinton campaign's coffin.

Collective action problems: not just for economists any more.

My question is if the media really is an all-powerful force shaping the debate, why can't we band together and tell everyone that the race is over, thus making it true? Where's the vast media conspiracy when you need it?