Well they did speculate a Q4 release for the HD so my guess would be around December if the Bionic is getting released in September.
EDIT: According to Phandroid, the Bionic will have Wifi printing. But in the article they said everything we know about the phone will stay the same. The problem is they stated the processor was a Tegra 2, so can anyone tell Phandroid in the comments for this article that it's an OMAP and not Tegra 2? I'm at work so I can't access the comments.