Ezra and Big Media Matt have a pair of suggestions worth listening to. Ezra suggests a Kerry Shadow Cabinet, and Matt suggests rolling them out fairly slowly to give the Heathers something to talk about. Agreed on both counts.
...just wanted to add that I don't think that this fake cabinet should be advertised as the actual cabinet-to-be in a Kerry presidency. Just people playing the appropriate advisory roles in the Kerry Campaign. You avoid some potential pitfalls that way.