I agree that Callebaut is probably the best Belgian chocolate you can get your hands on in the US. Chocosphere is where I get most of my chocolate fix satisfied, and I do think they have some Callebaut cocoa powder:
As an aside, when I had my dark chocolate blog I would consistently get 10 times as many hits when I posted about some mediocre mass-market stuff like Godiva, compared to the really high-end single origin stuff from guys like Pralus and Amedei. You know your audience, so you should consider whether Godiva may be a better choice for name recognition's sake.
That is interesting feed back and I appreciate it. I'm not sure I want to go so gimmicky as to use a brand name. Just "Belgian" is enough for me, as long as it is factual. But of course most people are idgits (not a typo, direct from looney tunes) and what you post makes so many damn sense!