It looks like Bloodrayne: Betrayal will be hitting Xbox Live Arcade on September 7, instead of the initial release of October 6.
This was revealed in a "You've read the rumors and gossip, but here's the facts: BloodRayne: Betrayal will be on PSN 9/6 and XBLA 9/7!"from the official game twitter:
Could this be a result of Microsoft's? Only publisher Majesco knows.