The Secret Cardinal is now in stores! Links to bookstores are conveniently provided at the book's website linked above.
Edit: Tomgrace.net is now online as well.
A video interview is on metacafe, which means it's embeddable here:
Chinese Government Versus The Vatican
The video trailer for the book, consisting of a professionally shot scene from the book designed to introduce and intrigue, is through production and in the final stages of editing. I will certainly post it here as soon as possible.