Blizzard updated its under developement page which gives some background info and a sneak peek at the upcoming 3.1 raid instance Ulduar: UnderDevelopement For countless millennia, Ulduar has remained undisturbed by mortals, far away from their concerns and their struggles.

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Under Developement: Ulduar

For the past two or three days Eyonix, and lead developer, has been posting a three part series in the official forums outlining upcoming 3.1 class changes. Finally this morning the third part was released and along with it came the DK news. Eyonix We are planning a lot of exciting content for patch 3.1.0, and we are doing a three-part preview series on upcoming class changes.

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3.1 Death Knight Changes

In a thread of Mage QQ today, Ghostcrawler let is be known that information about class changes for 3.1 would be coming out “soon”. Hopefully that means that 3.1 will be on PTR’s “soon” as well. Ghostcrawler We are going to be announcing some of our plans for classes in 3.1 fairly soon.

Originally posted here: 
Class Change Announcements For 3.1 Coming Soon, A Fix For Ebon Plague is Not.

A new PTR build was pushed last night and and one of the biggest changes was the removal of the Blacksmithed tanking weapons . Ghostcrawler The two-handed Blacksmithing tanking weapons are not going to be implemented

Excerpt from:
Patch 3.0.8 Build 9438 Death Knight Changes