So it turns out that Valiant is getting raped by Diamond over distribution: 

“After careful review and discussion, Diamond Comics and Valiant Entertainment mutually agreed that Harbinger: The Beginning will be distributed via the ‘Valiant Retailer Direct’ program and not through Diamond Comics Distributors,” reads the release.

“The Valiant Retailer Direct program ensures that Valiant readers receive Harbinger: The Beginning within a few days of its scheduled release date, while removing the unnecessary burden on a third party distributor until a current legal dispute is resolved and giving Valiant Entertainment the opportunity to form relationships directly with valuable retail customers,” said Walter Black, Senior Vice President & Publisher of Valiant Entertainment, in the release.

[…]

The volume will apparently also be available through other retail means and as of Monday evening was available for order on Amazon.com

Source.

Ouch, Diamond basically MAKES the direct market.  Without Diamond the sales for this book are going to tank, hard.  I’m still going to get a copy, but… ouch!  The source of this dispute is probably best explained by Newsarama here and is so insanely complicated that I’m not even going to bother to get into it.