It looks like there's a new book in the Horus Heresy line from Forgeworld for Warhammer 30k: Conquest Rumors say there will be rules for most of the Legions/Chapters, Imperial armies,  Mechanicus, and judging by the video, Imperial Knights. I don't know if the Xenos will get any love though. I think a few armies like Eldar and Orks deserve to get a 30K list.

Games Workshop released a couple of new FAQs the other day, including the main rule books for Warhammer 40k and Warhammer Fantasy Battles, as well as a number of codexes and the Wood Elf army book. Link to Black Library Imperial Knight players should be happy. I still need to glue mine together.