The Necrons are up, with them are some designer notes and touches of fluff.
[url]http://www.games-workshop.com/gws/content/article.jsp?categoryId=cat700019a&aId=18500101a[/url]
Three page expose on the Necrons.
The fluff has indeed changed. C'tan are now slaves to the Necrons themselves, yes, that's right, fluff rewritten.
It used to be the C'Tan controlling the Necrons. The Necrons would guard the C'Tan as they waited for the galaxy to spawn new life to harvest... Now the C'Tan are kept in handy containers for the Necrons lords to use if they wish.
100% retconnnnnn.
What does this mean? Well, now the lords themselves are free to do whatever their non-existent heart desires. Much like DE. Lords collect imperial relics, and apparently primarchs too. They extinguish systems, or subjugate the Emperor's rule and become masters of human worlds.
No more- KILL EVERYTHING. No more- DHARVEST THEIR SOULS.
[url]http://www.games-workshop.com/gws/catalog/productDetail.jsp?catId=cat700003a&prodId=prod1380 047a[/url] -- Nightbringer C'Tan *Shard*
I'm meh about it, as I haven't read the codex itself yet, but judging by this, the main driver of the Necron race has been replaced. Instead of being guided by C'Tan to kill everything, they have a more desperate, yet organized 'underground' sovereign empire, where lords can pretty much do as they please. Their new goal is to take control of the galaxy, finally achieving their ultimate goal.
EDIT: New link-
[url]http://www.games-workshop.com/gws/content/blogPost.jsp?aId=18500105a[/url] video of 360's of all the new models :3