It looks like Warhammer 40k roleplay has been delayed until next year - from Black Industries:

"Black Industries, the creators of Warhammer 40,000 Roleplay, announce a later than planned release date for the launch product Dark Heresy. The first releases in this roleplaying line will now hit the shelves in February 2008.

"Fans will not have to wait until February to get their hands on the rules, however. Black Industries are preparing a free demo booklet of cut down rules to be given away at Gen Con Indy in August. It’ll also be available as a free download exclusively from the BI website."