We can think of any number of uses for the special talents of James Van Praagh, co-executive producer of The Ghost Whisperer, bestselling author and psychic medium to the stars. On one hand, the news of his recent consorting with Heath Ledger's ghost has us surmising that he might just be another facet of Warner Bros. viral marketing machine for The Dark Knight. Reading on between the lines, however, our own Spidey-sense tingled upon perceiving the true implications of Van Praagh's power: